Regrowth + Emeritus of Abundance // Regrowth + Pyromancer Ascension + Turnabout + Altar of Dementia
Infinite Mill: Infinite ETB, Infinite LTB, Infinite death triggers, Infinite magecraft triggers, Infinite mill, Infinite sacrifice triggers, Infinite self-mill, Infinite untap of lands, creatures, and artifacts you control
Cast a copy of Regrowth from exile by paying {1}{G}, targeting any card besides the actual Regrowth.
Pyromancer's Ascension's first ability triggers, allowing you to put a quest counter on it.
Resolve the copy of Regrowth, returning that card from your graveyard to your hand.
Declare Emeritus of Abundance as an attacker.
When Emeritus of Abundance attacks, it triggers, becoming prepared.
During your second main phase, cast a copy of Regrowth by paying {1}{G}, targeting the actual Regrowth card.
Pyromancer Ascension's first ability triggers, allowing you to put a quest counter on it.
Resolve the copy of Regrowth, returning Regrowth from your graveyard to your hand.
Cast Turnabout by paying its mana cost.
Pyromancer Ascension's second ability triggers, copying Turnabout.
Resolve a copy of Turnabout, untapping lands you control.
Activate those lands by tapping them, adding mana.
Resolve the remaining copy of Turnabout, untapping lands you control.
Activate those lands by tapping them, adding mana.
Activate Altar of Dementia by sacrificing Emeritus of Abundance, producing that card's result.
Cast the card Regrowth from your hand by paying {1}{G}, targeting Emeritus of Abundance.
Pyromancer Ascension's second ability triggers, copying Regrowth and allowing you to target Turnabout with the copy.
Resolve both copies of Regrowth, returning Emeritus of Abundance and Turnabout from your graveyard to your hand.
Cast Turnabout by paying its mana cost.
Pyromancer Ascension's second ability triggers, copying Turnabout.
Resolve a copy of Turnabout, untapping lands you control.
Activate those lands by tapping them, adding mana.
Resolve the remaining copy of Turnabout, untapping lands you control.
Activate those lands by tapping them, adding mana.
Cast Emeritus of Abundance by paying {2}{G}.
Cast a copy of Regrowth from exile by paying {1}{G}, targeting Turnabout.
Both of Pyromancer Ascension's abilities trigger.
In response, activate Altar of Dementia by sacrificing Emeritus of Ideation, producing that card's result.
Resolve Pyromancer Ascension's first abiliity, putting a redundant quest counter on it if desired.
Resolve Pyromancer Ascension's second ability, copying Regrowth and targeting Emeritus of Abundance with the copy.
Repeat from step 18.
Cards: Regrowth, Emeritus of Abundance // Regrowth, Pyromancer Ascension, Turnabout, Altar of Dementia
