You control at least one creature.

Cast Ephemerate by paying , targeting any creature you control.
Holding priority, cast Dualcaster Mage by paying .
Dualcaster Mage enters the battlefield, creating a copy of Ephemerate targeting Dualcaster Mage.
Resolve the copy of Ephemerate, blinking Dualcaster Mage.
Repeat from step 3.

You control at least one creature.
You have enough mana to cast Sublime Epiphany

Cast Sublime Epiphany 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 Sublime Epiphany, targeting Dualcaster Mage.
Resolve the copy of Sublime Epiphany, creating a token copy of Dualcaster Mage.
Repeat from step 3.

You may choose more of Sublime Epiphany's modes, if desired.

Activate Woe Strider by sacrificing the persist or undying creature.
When the creature dies, its persist or undying ability triggers if it doesn't have a -1/-1 counter or +1/+1 counter on it respectively, and Luminous Broodmoth triggers if the creature didn't have flying.
Resolve the persist or undying trigger, if applicable, returning the creature from your graveyard to the battlefield with either a -1/-1 counter or a +1/+1 counter on it.
Resolve the Luminous Broodmoth trigger, if applicable, returning the creature from your graveyard to the battlefield with a flying counter on it if the creature is still in your graveyard.
Resolve the Woe Strider ability.
Repeat.

You must choose a persist or undying creature that does not have flying - otherwise the Luminous Broodmoth triggers do not occur.

Cast Baral's Expertise by paying .
Holding priority, cast Dualcaster Mage by paying .
Dualcaster Mage enters the battlefield, creating a copy of Baral's Expertise targeting Dualcaster Mage.
Resolve the copy of Baral's Expertise, returning Dualcaster Mage from the battlefield to your hand, and casting Dualcaster Mage from your hand without paying its mana cost.
Repeat from step 3.

You control at least one creature.
You have enough mana to cast Quasiduplicate

Cast Quasiduplicate 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 Quasiduplicate, targeting Dualcaster Mage.
Resolve the copy of Quasiduplicate, creating a token copy of Dualcaster Mage.
Repeat from step 3.

Kaya the Inexorable has at least seven loyalty counters on it.
You control an additional legendary creature or planeswalker if Kaya the Inexorable has seven loyalty counters on it.

Activate Kaya's third loyalty ability by removing seven loyalty counters from it, causing you to get an emblem.
Cast Karn's Temporal Sundering by paying , causing you to take an extra turn after this one.
Move to your next turn.
At the beginning of your upkeep, Kaya's emblem triggers, causing you to cast Karn's Temporal Sundering from your graveyard without paying its mana cost.
Resolve Karn's Temporal Sundering, causing you to take an extra turn after this one.
Repeat from step 3.

You control at least one creature.
You have enough mana to cast Mythos of Illuna

Cast Mythos of Illuna 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 Mythos of Illuna, targeting Dualcaster Mage.
Resolve the copy of Mythos of Illuna, creating a token copy of Dualcaster Mage.
Repeat from step 3.

Activate Woe Strider by sacrificing the persist creature.
The sacrificed creature's persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
The Great Henge triggers, putting a +1/+1 counter on the persist creature and causing you to draw a card.
The -1/-1 and +1/+1 counters are removed as a state-based action.
Resolve the ability from step 1.
Repeat.

You control at least one creature.

Cast Momentary Blink by paying , targeting any creature you control.
Holding priority, cast Dualcaster Mage by paying .
Dualcaster Mage enters the battlefield, creating a copy of Momentary Blink targeting Dualcaster Mage.
Resolve the copy of Momentary Blink, blinking Dualcaster Mage.
Repeat from step 3.

Cast an instant or sorcery spell, or wait for an opponent to cast one.
Holding priority, cast Expansion by paying , targeting the spell.
Activate Rootha by paying and returning it to your hand, copying Expansion, with the copy targeting the original Expansion.
Resolve the copy of Expansion, copying Expansion, targeting the original Expansion.
Repeat step 4.

You control at least one creature.
You have enough mana to cast Croaking Counterpart

Cast Croaking Counterpart 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 Croaking Counterpart, targeting Dualcaster Mage.
Resolve the copy of Croaking Counterpart, creating a token copy of Dualcaster Mage that is a 1/1 Frog.
Repeat from step 3.

Activate Woe Strider by sacrificing Glasspool Mimic.
When Glasspool Mimic dies, its last ability from Cavalier of Night triggers, returning itself from your graveyard to the battlefield as a copy of Cavalier of Night.
When Glasspool Mimic enters the battlefield, its first triggered ability from Cavalier of Night triggers; choose not to sacrifice a creature.
Resolve the Woe Strider ability from step 1.
Repeat.

You control a creature with power 7 or greater that isn't Selvala.

If Selvala has summoning sickness, activate Kenrith's first ability by paying , giving all creatures haste until end of turn.
Activate Selvala by paying and tapping it, adding at least .
Activate Woe Strider by sacrificing Selvala, causing you to scry 1.
Activate Kenrith's fifth ability by paying , returning Selvala from your graveyard to the battlefield.
Repeat.