You control at least one creature.
You have enough mana to cast Saw in Half

Cast Saw in Half by paying its mana cost, targeting a creature you control.
Holding priority, cast Dualcaster Mage by paying .
When Dualcaster Mage enters the battlefield, it triggers, copying Saw in Half, targeting Dualcaster Mage.
Resolve the copy of Saw in Half, destroying Dualcaster Mage and creating two token copies of it with half its toughness and power, rounded up each time.
Repeat from step 3.

Cast Saw in Half by paying , destroying Pinnacle Monk and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Pinnacle Monk // Mystic Peak tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Pinnacle Monk and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Pinnacle Monk tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Eternal Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Eternal Witness tokens enter the battlefield, they trigger, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Pinnacle Monk and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Pinnacle Monk tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Pinnacle Monk token, adding an amount of equal to its mana value.
Repeat.

Cast Dark Ritual by paying , adding .
Activate Cormela by paying and tapping them, adding that can only be used to cast instants or sorceries.
Cast Saw in Half by paying targeting Cormela, destroying them and creating two token copies of Cormela with half the destroyed creature's base power and toughness.
Put one of the Cormela tokens in the graveyard due to the legend rule.
The Cormela that died in step 3 and the Cormela that died in step 4 each trigger when they die, returning Dark Ritual and Saw in Half from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Bladewing and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one of the Bladewing tokens into your graveyard from the battlefield due to the legend rule.
The Bladewing tokens' enter-the-battlefield abilities trigger.
Resolve the first trigger, returning Bladewing from your graveyard to the battlefield.
Put Bladewing into your graveyard from the battlefield due to the legend rule.
Bladewing enter-the-battlefield ability triggers, returning it from your graveyard to the battlefield.
Repeat from step 5.

Your opponents control at least five artifacts and/or enchantments.

Cast Saw in Half by paying , destroying Dockside Extortionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Both Dockside Extortionist tokens enter the battlefield, creating at least ten Treasure tokens.
Activate nine Treasure tokens by tapping and sacrificing them, adding .
Cast Eternal Witness by paying .
Eternal Witness enters the battlefield, returning Saw in Half from your graveyard to your hand.
Cast Saw in Half by paying , destroying Eternal Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Both Eternal Witness tokens enter the battlefield, returning Eternal Witness and Saw in Half from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , targeting Eternal Witness.
Holding priority, activate Lion's Eye Diamond by sacrificing it and discarding your hand, adding .
Resolve Saw in Half, destroying Eternal Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The Eternal Witness tokens enter the battlefield, returning Lion's Eye Diamond and Saw in Half from your graveyard to your hand.
Cast Lion's Eye Diamond by paying .
Repeat.

Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taqs dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taqs you control.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^695.6224481408007) creature tokens.

Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^308.0343553279263) creature tokens.

An opponent has at least four cards in hand.

Cast Jeska's Will by paying , adding at least .
Activate Cormela by paying and tapping it, adding that can only be spent to cast instand and/or sorcery spells.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one of the Cormela tokens into your graveyard due to the legend rule.
The Cormela that died in step 3 and the Cormela that died in step 4 each trigger, returning Jeska's Will and Saw in Half from your graveyard to your hand.
Repeat.

You control at least one creature.
You have enough mana to cast Saw in Half

Cast Saw in Half by paying its mana cost, targeting a creature you control.
Holding priority, cast Naru Meha either from your hand or from the command zone by paying plus commander tax, if applicable.
When Naru Meha enters the battlefield, it triggers, copying Saw in Half, targeting Naru Meha.
Resolve the copy of Saw in Half, destroying Naru Meha and creating two token copies of it with half its toughness and power, rounded up each time.
Put either Naru Meha into your graveyard due to the legend rule.
Repeat from step 3.

Cast Cabal Ritual by paying , adding at least .
Activate Cormela by paying and tapping it, adding that can only be spent to cast instand and/or sorcery spells.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one of the Cormela tokens into your graveyard due to the legend rule.
The Cormela that died in step 3 and the Cormela that died in step 4 each trigger, returning Cabal Ritual and Saw in Half from your graveyard to your hand.
Repeat.
If you have seven or more cards in your graveyard, this combo nets infinite mana.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Scholar of the Ages and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Scholar of the Ages tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand, as well as up to two additional instants or sorceries.
Repeat.

Cast Saw in Half by paying , destroying Scholar of the Ages and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Scholar of the Ages tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand along with up to two other instants and/or sorceries.
Cast Burnt Offering by paying and sacrificing a Scholar of the Ages token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Cast Saw in Half by paying , destroying Scholar of the Ages and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The two Scholar of the Ages tokens enter the battlefield, returning Sacrifice, if applicable, and Saw in Half from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Scholar of the Ages token, adding seven .
Repeat.
You may also return up to two other instants and/or sorceries using the Scholar of the Ages tokens if they can be cast using black mana to get infinite casts of those instants and/or sorceries.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Archaeomancer and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Both Archaeomancer tokens enter the battlefield, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taqs dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taqs you control.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^695.6224481408007) creature tokens.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Archaeomancer and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Archaeomancer tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Archaeomancer and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Archaeomancer tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Archaeomancer token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Your opponents control at least five artifacts and/or enchantments.

Cast Saw in Half by paying , destroying Dockside Extortionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The Dockside Extortionist tokens enter the battlefield, creating at least ten Treasure tokens.
At the beginning of your next upkeep, Revel in Riches triggers, causing you to win the game.

Cast Seething Song by paying , adding .
Activate Cormela by paying and tapping it, adding that can only be spent to cast instand and/or sorcery spells.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one of the Cormela tokens into your graveyard due to the legend rule.
The Cormela that died in step 3 and the Cormela that died in step 4 each trigger, returning Seething Song and Saw in Half from your graveyard to your hand.
Repeat.
If you have seven or more cards in your graveyard, this combo nets infinite mana.

Cast Saw in Half by paying , destroying Archaeomancer and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Archaeomancer tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Archaeomancer token, adding an amount of equal to its mana value.
Repeat.

Cast Saw in Half by paying , destroying Revolutionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Revolutionist tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Revolutionist token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Cast Saw in Half by paying , destroying Ardent Elementalist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Ardent Elementalist tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Ardent Elementalist token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Cast Saw in Half by paying , destroying Timeless Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Timeless Witness tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Timeless Witness token, adding an amount of equal to its mana value.
Repeat.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Ardent Elementalist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Ardent Elementalist tokens enter the battlefield, they trigger, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

Kaya has at least two loyalty counters on it.

Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 5 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^308.0343553279263) creature tokens.

Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^308.0343553279263) creature tokens.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Timeless Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Timeless Witness tokens enter the battlefield, they trigger, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Ardent Elementalist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Ardent Elementalist tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Timeless Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Timeless Witness tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Timeless Witness token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Revolutionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Revolutionist tokens enter the battlefield, they trigger, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taqs dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taqs you control.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^695.6224481408007) creature tokens.

Cast Saw in Half by paying , destroying Ardent Elementalist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Ardent Elementalist tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Ardent Elementalist token, adding an amount of equal to its mana value.
Repeat.

Kaya has at least two loyalty counters on it.

Activate Kaya's second loyalty ability by removing two loyalty counters from it, causing you to double any tokens you create this turn.
Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taqs dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taqs you control.
Repeat step 5 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^695.6224481408007) creature tokens.

Cast Saw in Half by paying , destroying Revolutionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Revolutionist tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Revolutionist token, adding an amount of equal to its mana value.
Repeat.

At the beginning of your upkeep, Mechanized Production triggers.
Holding priority, cast Saw in Half by paying , destroying Myr Battlesphere and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The Myr Battlesphere tokens enter the battlefield, creating eight 1/1 Myr artifact creature tokens.
Resolve the Mechanized Production trigger, creating a token copy of the artifact it is attached to and causing you to win the game.

Activate Cormela by paying and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Time Warp by paying , causing you to take an extra turn after this one.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Cormela token into your graveyard due to the legend rule.
When the original Cormela and the token Cormela die, their abilities trigger, returning Time Warp and Saw in Half from your graveyard to your hand.
Repeat each turn.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Revolutionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Revolutionist tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

Opponents control at least five artifacts and/or enchantments.

Cast Saw in Half by paying , destroying Dockside Extortionist and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Dockside Extortionist tokens enter the battlefield, they trigger, creating at least ten Treasure artifact tokens.
Activate ten Treasure tokens by tapping and sacrificing them, adding .
Cast Timeless Witness by paying .
When Timeless Witness enters the battlefield, it triggers, returning Saw in Half from your graveyard to your hand.
Cast Saw in Half by paying , destroying Timeless Witness and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Timeless Witness tokens enter the battlefield, it triggers, returning Timeless Witness and Saw in Half from your graveyard to your hand.
Repeat.
If opponents control six or more artifacts and/or enchantments, this combo nets infinite Treasure tokens and colored mana.

Cast Saw in Half by paying , destroying Mondrak and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put either Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control.
Repeat step 4 for the remaining triggers.

Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 4 for the remaining triggers.

Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taq dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taq you control plus one.
Repeat step 4 for the remaining triggers.

Activate Cormela by paying and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Temporal Manipulation by paying , causing you to take an extra turn after this one.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Cormela token into your graveyard due to the legend rule.
When the original Cormela and the token Cormela die, their abilities trigger, returning Temporal Manipulation and Saw in Half from your graveyard to your hand.
Repeat each turn.

Cast Saw in Half by paying , destroying Mnemonic Wall and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The two Mnemonic Wall tokens enter the battlefield, returning Sacrifice, if applicable, and Saw in Half from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Mnemonic Wall token, adding .
Repeat.
Once you have infinite mana, you may instead return any other instant or sorcery that can be cast using only black mana in place of Sacrifice using the Mnemonic Wall tokens to get infinite casts of those instants and/or sorceries.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Mnemonic Wall and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Both Mnemonic Wall tokens enter the battlefield, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^308.0343553279263) creature tokens.

Cast Saw in Half by paying , destroying Greenwarden of Murasa and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Greenwarden of Murasa tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Greenwarden of Murasa token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^308.0343553279263) creature tokens.

Cast Saw in Half by paying , destroying Biovisionary and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
End your turn.
All the Biovisionaries trigger.
Resolve the first Biovisionary trigger, winning the game.

Cast Saw in Half by paying , destroying Izzet Chronarch and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Izzet Chronarch tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Izzet Chronarch token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Cast Saw in Half by paying , destroying Greenwarden of Murasa and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Greenwarden of Murasa tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Greenwarden of Murasa token, adding an amount of equal to its mana value.
Repeat.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Mnemonic Wall and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Mnemonic Wall tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Biovisionary and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
End your turn.
All the Biovisionaries trigger.
Resolve the first Biovisionary trigger, winning the game.

Activate Cormela by paying and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Capture of Jingzhou by paying , causing you to take an extra turn after this one.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Cormela token into your graveyard due to the legend rule.
When the original Cormela and the token Cormela die, their abilities trigger, returning Capture of Jingzhou and Saw in Half from your graveyard to your hand.
Repeat each turn.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Shipwreck Dowser and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Shipwreck Dowser tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taqs dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taqs you control.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^695.6224481408007) creature tokens.

You control a nonlegendary artifact creature that does not have Mechanized Production attached.

At the beginning of your upkeep, Mechanized Production triggers.
Holding priority, cast Saw in Half by paying , destroying a nonlegendary artifact creature you control and creating eight token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Resolve the Mechanized Production trigger, creating a token copy of the artifact it is attached to, and causing you to win the game.

Cast Saw in Half by paying , destroying Shipwreck Dowser and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
The two Shipwreck Dowser tokens enter the battlefield, returning Sacrifice, if applicable, and Saw in Half from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Shipwreck Dowser token, adding .
Repeat.
Once you have infinite mana, you may instead return any other instant or sorcery that can be cast using only black mana in place of Sacrifice using the Shipwreck Dowser tokens to get infinite casts of those instants and/or sorceries.

Cast Saw in Half by paying , destroying Biovisionary and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
End your turn.
All the Biovisionaries trigger.
Resolve the first Biovisionary trigger, winning the game.

Cast Saw in Half by paying , destroying Ojer Taq and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Ojer Taq token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Ojer Taqs dying.
Resolve the first trigger, creating 2*(3^X) nonlegendary token copies of Ojer Taq that are 2/2 Zombies, where X is the number of Ojer Taqs you control.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^695.6224481408007) creature tokens.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Izzet Chronarch and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Izzet Chronarch tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

Activate Cormela by paying and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Walk the Aeons by paying , causing you to take an extra turn after this one.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Cormela token into your graveyard due to the legend rule.
When the original Cormela and the token Cormela die, their abilities trigger, returning Walk the Aeons and Saw in Half from your graveyard to your hand.
Repeat each turn.

Your opponents control at least four artifacts and/or enchantments; additional ones beyond this minimum can reduce the mana needed.

Cast Saw in Half by paying , destroying Dockside Extortionist and creating two 1/1 token copies of it.
When the Dockside Extortionist tokens enter the battlefield, they trigger, creating at least eight Treasure tokens in total.
Cast Mechanized Production by paying while keeping at least seven Treasures on the battlefield, attaching it to a Treasure you control.
At the beginning of your next upkeep, Mechanized Production triggers, causing you to create a token of the artifact Mechanized Production is attached to and win the game.

Cast Saw in Half by paying , destroying Shipwreck Dowser and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Shipwreck Dowser tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Shipwreck Dowser token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

Activate Cormela by paying and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Saw in Half by paying , destroying Cormela and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Cormela token into your graveyard due to the legend rule.
When the original Cormela and the token Cormela die, their abilities trigger, returning Time Warp and Saw in Half from your graveyard to your hand.
Activate the Cormela token by paying and tapping it, adding that can only be spent to cast instant or sorcery spells.
Cast Time Stretch by paying , causing you to take two extra turns after this one.
Repeat during your second extra turn.

Cast Saw in Half by paying , destroying Salvager of Secrets and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Salvager of Secrets tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Salvager of Secrets token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

You control a nonlegendary artifact creature that does not have Mechanized Production attached.

At the beginning of your upkeep, Mechanized Production triggers.
Holding priority, cast Saw in Half by paying , destroying a nonlegendary artifact creature you control and creating eight token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Resolve the Mechanized Production trigger, creating a token copy of the artifact it is attached to, and causing you to win the game.

Cast Saw in Half by paying , destroying Izzet Chronarch and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Izzet Chronarch tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Izzet Chronarch token, adding an amount of equal to its mana value.
Repeat.

You control an additional creature.

Cast Culling the Weak by paying and sacrificing another creature, adding .
Cast Saw in Half by paying , destroying Salvager of Secrets and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Salvager of Secrets tokens enter the battlefield, they trigger, returning Saw in Half and Culling the Weak from your graveyard to your hand.
Repeat.

You control at least four other creatures with +1/+1 counters on them.

On the end step prior to your turn, cast Saw in Half by paying , destroying Slurrk and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put one Slurrk token into your graveyard due to the legend rule.
Each Slurrk triggers once, and Simic Ascendancy's first ability triggers twice.
Resolve both Simic Ascendancy triggers, putting ten growth counters on it.
Resolve the first Slurrk trigger, putting a +1/+1 counter on each creature you control that has a +1/+1 counter on it.
Simic Ascendacy's first ability triggers for each counter placed this way, putting that many growth counters on it.
Repeat from step 5 for the remaining trigger.
At the beginning of your upkeep, Simic Ascendancy's second ability triggers, causing you to win the game.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Vampire Charmseeker and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Both Vampire Charmseeker tokens enter the battlefield, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

Cast Saw in Half by paying , destroying Mondrak and creating four token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Put all but one Mondrak token into your graveyard due to the legend rule.
Ratadrabik triggers four times from the nontoken and token Mondraks dying.
Resolve the first trigger, creating 2^X nonlegendary token copies of Mondrak that are 2/2 Zombies, where X is the number of Mondraks you control plus one.
Repeat step 4 for the remaining triggers.

Assuming you control no other token doublers, this combo will make a total of 10^(10^308.0343553279263) creature tokens.

You control a nonlegendary artifact creature that does not have Mechanized Production attached.

At the beginning of your upkeep, Mechanized Production triggers.
Holding priority, cast Saw in Half by paying , destroying a nonlegendary artifact creature you control and creating eight token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Resolve the Mechanized Production trigger, creating a token copy of the artifact it is attached to, and causing you to win the game.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Salvager of Secrets and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Both Salvager of Secrets tokens enter the battlefield, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.

You control a nonlegendary artifact creature that does not have Mechanized Production attached.

At the beginning of your upkeep, Mechanized Production triggers.
Holding priority, cast Saw in Half by paying , destroying a nonlegendary artifact creature you control and creating eight token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
Resolve the Mechanized Production trigger, creating a token copy of the artifact it is attached to, and causing you to win the game.

Cast Saw in Half by paying , destroying Possessed Skaab and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Possessed Skaab tokens enter the battlefield, they trigger, returning Saw in Half and Sacrifice from your graveyard to your hand.
Cast Sacrifice by paying and sacrificing a Possessed Skaab token, adding an amount of equal to its mana value.
Repeat.

On the end step prior to your turn, cast Saw in Half by paying , destroying Myr Battlesphere and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time, as well as two 1/1 Squirrel creature tokens.
The Myr Battlesphere tokens enter the battlefield, creating eight 1/1 Myr artifact creature tokens and eight 1/1 Squirrel creature tokens.
At the beginning of your next upkeep, Epic Struggle triggers, causing you to win the game.

Cast Saw in Half by paying , destroying Mnemonic Wall and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Mnemonic Wall tokens enter the battlefield, they trigger, returning Saw in Half and Burnt Offering from your graveyard to your hand.
Cast Burnt Offering by paying and sacrificing a Mnemonic Wall token, adding plus an additional amount of and/or equal to its mana value minus 2.
Repeat.

You have at least seven cards in your graveyard.

Cast Cabal Ritual by paying , adding .
Cast Saw in Half by paying , destroying Izzet Chronarch and creating two token copies of it with base power equal to half the destroyed creature's power and base toughness equal to half the destroyed creature's toughness, rounding up each time.
When the Izzet Chronarch tokens enter the battlefield, they trigger, returning Saw in Half and Cabal Ritual from your graveyard to your hand.
Repeat.