You have a card in hand.

Activate Psychic Frog by discarding a card.
Cryptcaller Chariot triggers, causing you to create a tapped 2/2 Zombie creature token.
When the Zombie enters the battlefield, Kindred Discovery triggers, causing you to draw a card.
Resolve the Psychic Frog ability.
Repeat.

You have at least one permanent card in hand.
Evolution Witness has at least one +1/+1 counter on it.

Activate Evolution Witness using Psychic Frog's first ability by discarding a permanent card, putting a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning the permanent card from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding a card.
Toluz's second ability triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Queza triggers, causing you to gain 1 life and an opponent to lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding a card.
Toluz's second ability and Feast of Sanity trigger.
Resolve the Feast of Sanity trigger, dealing 1 damage to any target and causing you to gain 1 life.
Resolve the Toluz trigger, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding a card.
Toluz's second ability triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Sheoldred triggers, causing you to gain 2 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Teval and Kheru Goldkeeper trigger, creating a creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Psychic Frog by discarding a card.
Necropotence triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Sheoldred triggers, causing you to gain 2 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding a card.
Curator of Mysteries triggers, causing you to scry 1.
Matoya triggers, causing you to draw a card.
Resolve the Psychic Frog ability.
Repeat.

You have at least one card in hand.

Activate Psychic Frog by discarding a card.
Glint-Horn Buccaneer triggers, dealing 1 damage to each opponent.
Niv-Mizzet triggers, causing you to draw that many cards.
Resolve the Psychic Frog ability, putting a +1/+1 counter on it.
Repeat.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Insidious Roots and Kheru Goldkeeper trigger, creating a creature token and a Treasure token and putting a +1/+1 counter on each Plant you control.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

You have a way to cause an artifact to enter the battlefield under your control.

Cause an artifact to enter the battlefield under your control.
Ovalchase Daredevil triggers, returning it from your graveyard to your hand.
Kheru Goldkeeper triggers. Holding priority, activate Psychic Frog by discarding Ovalchase Daredevil.
Resolve the Kheru Goldkeeper trigger, creating a Treasure token.
Repeat from step 2.

If you have more than three cards in hand, activate Psychic Frog by discarding a card.
Repeat step 1 until you have three or fewer cards in hand.
At the beginning of your end step, Doctor Octopus triggers, causing you to draw at least five cards.
Lyla triggers for each card drawn, putting that many +1/+1 counters on Sage of Hours.
Activate Sage of Hours by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
Repeat each turn.

You have a creature or artifact card in your graveyard.
You have a way to put a +1/+1 counter on Evolution Witness.

Put a +1/+1 counter on Evolution Witness.
Evolution Witness triggers, returning an artifact or creature card from your graveyard to your hand.
Thran Vigil triggers. Holding priority, activate Psychic Frog by discarding an artifact or creature card.
Resolve the Thran Vigil ability, putting a +1/+1 counter on Evolution Witness.
Repeat from step 2.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Desecrated Tomb and Kheru Goldkeeper trigger, creating a creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Psychic Frog by discarding a card.
Necropotence triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Queza triggers, causing you to gain 1 life and target opponent to lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

You have a card in hand.
Your life total is at least 2.

Activate Psychic Frog by discarding a card.
Containment Construct triggers, exiling the discarded card with the ability to play it until end of turn.
Ketramose triggers, causing you to draw a card and lose 1 life.
Queza triggers, causing you to gain 1 life and an opponent to lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

You have a way to cause an artifact to enter the battlefield under your control.

Cause an artifact to enter the battlefield under your control.
Ovalchase Daredevil triggers, returning itself from your graveyard to your hand.
Chalk Outline triggers. Holding priority, activate Psychic Frog by discarding Ovalchase Daredevil.
Resolve the Chalk Outline trigger, creating a 2/2 Detective creature token and a Clue token.
Repeat from step 2.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Tormod and Kheru Goldkeeper trigger, creating a creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Skeleton Crew and Kheru Goldkeeper trigger, creating a creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Psychic Frog by discarding a card.
Necropotence and Feast of Sanity trigger.
Resolve the Feast of Sanity trigger, dealing 1 damage to any target and causing you to gain 1 life.
Resolve the Necropotence trigger, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

You have a card in hand.
Your life total is at least 2.

Activate Psychic Frog by discarding a card.
Containment Construct triggers, exiling the discarded card with the ability to play it until end of turn.
Ketramose triggers, causing you to draw a card and lose 1 life.
Shabraz triggers, causing you to gain 1 life and put a +1/+1 counter on Shabraz.
Resolve the Psychic Frog ability.
Repeat.

You have at least one card in hand.

Activate Psychic Frog's first ability by discarding a card.
Curator of Mysteries triggers, causing you to draw a card due to Eligeth.
Resolve the Psychic Frog ability, putting a +1/+1 counter on it.
Repeat.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Chalk Outline and Kheru Goldkeeper trigger, creating a creature token, a Clue token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Psychic Frog by discarding a card.
Toluz's second ability triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Shabraz triggers, causing you to gain 1 life and put a +1/+1 counter on Shabraz.
Resolve the Psychic Frog ability.
Repeat.

You have a card in hand.
Your life total is at least 2.

Activate Psychic Frog by discarding a card.
Containment Construct triggers, exiling the discarded card with the ability to play it until end of turn.
Ketramose triggers, causing you to draw a card and lose 1 life.
Sheoldred triggers, causing you to gain 2 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

An opponent cannot block creatures you control.

Activate Psychic Frog by discarding Rise of the Eldrazi.
Activate Magar by paying , noting Rise of the Eldrazi and putting it face down on the battlefield as a 3/3 creature.
During your next turn, deal combat damage to an opponent using the 3/3 creature that has Rise of the Eldrazi noted.
The creature triggers, casting a copy of Rise of the Eldrazi without paying its mana cost.
Resolve the Rise of the Eldrazi copy, causing you to take an extra turn after this one.
Repeat from step 3 during each turn.

The discard outlet is provided as a method of getting Rise of the Eldrazi into your graveyard, as it does not go to the graveyard after resolution. You can substitute any other method for this, including using mill or other techniques.

You have at least 3 land cards in your hand.

Activate Psychic Frog by discarding a land card.
Slogurk triggers, putting a +1/+1 counter on it.
Resolve the Psychic Frog ability.
Repeat from step 1 two additional times.
Activate Slogurk by removing three +1/+1 counters from it, returning it from the battlefield to your hand.
When Slogurk leaves the battlefield, it triggers, returning three land cards from your graveyard to your hand.
Cast Slogurk by paying due to Primal Prayers.
When Slogurk enters, Decoction Module triggers, causing you to get .
Repeat.

You have at least eight permanent cards in your graveyard.

Activate Psychic Frog by discarding a card.
Necropotence triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Starving Revenant triggers, causing you to gain 1 life and target opponent to lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding a card.
Necropotence triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Shabraz triggers, causing you to gain 1 life and put a +1/+1 counter on Shabraz
Resolve the Psychic Frog ability.
Repeat.

You have at least eight permanent cards in your graveyard.

Activate Psychic Frog by discarding a card.
Toluz's second ability triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Starving Revenant triggers, causing you to gain 1 life and an opponent to lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

You have at least eight permanent cards in your graveyard.
You have a card in hand.
Your life total is at least 2.

Activate Psychic Frog by discarding a card.
Containment Construct triggers, exiling the discarded card with the ability to play it until end of turn.
Ketramose triggers, causing you to draw a card and lose 1 life.
Starving Revenant triggers, causing you to gain 1 life and an opponent to lose 1 life.
Resolve the Psychic Frog ability.
Repeat.

You control at least one additional creature.

Activate Psychic Frog by discarding Ovalchase Daredevil, putting a +1/+1 counter on Psychic Frog.
Activate Shilgengar's first ability by sacrificing another creature, creating a Blood token.
When the Blood enters the battlefield, Ovalchase Daredevil triggers, returning Ovalchase Daredevil from your graveyard to your hand.
Desecrated Tomb triggers, creating a 1/1 Bat creature token.
Repeat.

You control at least one additional creature.

Activate Psychic Frog by discarding Ovalchase Daredevil, putting a +1/+1 counter on Psychic Frog.
Activate Shilgengar's first ability by sacrificing another creature, creating a Blood token.
When the Blood enters the battlefield, Ovalchase Daredevil triggers, returning Ovalchase Daredevil from your graveyard to your hand.
Skeleton Crew triggers, creating a 2/2 Skeleton Pirate creature token.
Repeat.

You control at least one additional creature.

Activate Psychic Frog by discarding Ovalchase Daredevil, putting a +1/+1 counter on Psychic Frog.
Activate Shilgengar's first ability by sacrificing another creature, creating a Blood token.
When the Blood enters the battlefield, Ovalchase Daredevil triggers, returning Ovalchase Daredevil from your graveyard to your hand.
Tormod triggers, creating a 2/2 Zombie creature token.
Repeat.

Activate Psychic Frog by discarding Ovalchase Daredevil
Bone Miser's first ability triggers, creating a 2/2 Zombie creature token.
Resolve the Psychic Frog ability, putting a +1/+1 counter on it.
Activate Shilgengar's first ability by sacrificing the Zombie, creating a Blood token.
When the Blood enters the battlefield, Ovalchase Daredevil triggers, returning Ovalchase Daredevil from your graveyard to your hand.
Repeat.

You control at least one nontoken nonartifact Lhurgoyf.
You have at least one nonartifact Lhurgoyf creature card in hand.

Activate Psychic Frog's first ability by discarding a nonartifact Lhurgoyf card.
Disa the Restless' first ability triggers, putting the discarded Lhurgoyf from your graveyard onto the battlefield.
When the Lhurgoyf enters the battlefield, Cloudstone Curio triggers, returning another nontoken nonartifact Lhurgoyf from the battlefield to your hand.
Resolve the Psychic Frog ability from step 1, putting a +1/+1 counter on it.
Repeat.

You have at least 3 land cards in your hand.

Activate Psychic Frog by discarding a land card.
Slogurk triggers, putting a +1/+1 counter on it.
Resolve the Psychic Frog ability.
Repeat from step 1 two additional times.
Activate Slogurk by removing three +1/+1 counters from it, returning it from the battlefield to your hand.
When Slogurk leaves the battlefield, it triggers, returning three land cards from your graveyard to your hand.
Cast Slogurk by paying due to Primal Prayers.
When Slogurk enters, Guide of Souls triggers, causing you to get and gain 1 life.
Repeat.

You have at least 3 land cards in your hand.

Activate Psychic Frog by discarding a land card.
Slogurk triggers, putting a +1/+1 counter on it.
Resolve the Psychic Frog ability.
Repeat from step 1 two additional times.
Activate Slogurk by removing three +1/+1 counters from it, returning it from the battlefield to your hand.
When Slogurk leaves the battlefield, it triggers, returning three land cards from your graveyard to your hand.
Cast Slogurk by paying due to Primal Prayers.
When Slogurk enters, Aetherstorm Roc triggers, causing you to get .
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
On Wings of Gold and Kheru Goldkeeper trigger, creating a creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Psychic Frog by discarding a card.
Necropotence triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Horizon Chimera triggers, causing you to gain 1 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding a card.
Toluz's second ability triggers, exiling the discarded card from your graveyard.
Ketramose triggers, causing you to draw a card and lose 1 life.
Horizon Chimera triggers, causing you to gain 1 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

You have a card in hand.
Your life total is at least 2.

Activate Psychic Frog by discarding a card.
Containment Construct triggers, exiling the discarded card with the ability to play it until end of turn.
Ketramose triggers, causing you to draw a card and lose 1 life.
Horizon Chimera triggers, causing you to gain 1 life.
Resolve the Psychic Frog ability.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart 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.
Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat from step 2.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

Activate Psychic Frog by discarding Gilded Assault Cart.
Mary Read and Anne Bonny triggers, creating two tapped Treasure tokens.
Resolve the Psychic Frog ability.
Activate Gilded Assault Cart by sacrificing two Treasures, returning Gilded Assault Cart from your graveyard to your hand.
Repeat.

You have at least one land card in hand.
You control at least one basic Forest.

Activate a basic Forest by tapping it, adding .
Activate Psychic Frog's first ability by discarding a land card.
Turntimber Sower triggers, creating three 0/1 Plant creature tokens.
Resolve the Psychic Frog ability, putting a +1/+1 counter on it.
Activate Earthcraft by tapping a Plant, untapping a basic Forest.
Activate Turntimber Sower by paying and sacrificing the three Plants, returning a land card from your graveyard to your hand.
Repeat.

Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Repeat from step 3 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
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.
Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Activate Kaya's first loyalty ability by putting a loyalty counter on it, giving creatures you control deathtouch until end of turn and putting a +1/+1 counter on a creature token you control.
Repeat from step 4 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
Repeat.

Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Repeat from step 3 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
Repeat.

Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Repeat from step 3 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
Repeat.

Activate Psychic Frog by discarding Gollum.
Activate Gollum by paying and sacrificing a creature, returning Gollum from your graveyard to your hand.
Quintorius and Kheru Goldkeeper trigger, creating a creature token and a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding .
Repeat.

Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Repeat from step 3 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
Repeat.

Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Repeat from step 3 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
Repeat.

Activate Osgir by paying , tapping it and exiling Ugin's Nexus from your graveyard, creating four token copies of Ugin's Nexus.
Put three of the Ugin's Nexus tokens into exile due to the legend rule and their replacement effects, causing you to take three extra turns after this one.
Activate Karn's first loyalty ability by putting a loyalty counter on it, choosing to do nothing.
Move to your next extra turn.
Repeat from step 3 one additional time.
Activate Karn's second loyalty ability by removing two loyalty counters from it, returning Ugin's Nexus from exile to your hand.
Activate Psychic Frog by discarding Ugin's Nexus.
Move to your last extra turn.
Repeat.