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 Early Harvest by paying its mana cost.
Pyromancer Ascension's second ability triggers, copying Early Harvest.
Resolve a copy of Early Harvest, untapping basic lands you control.
Activate those lands by tapping them, adding mana.
Resolve the remaining copy of Early Harvest, untapping lands you control.
Activate those lands by tapping them, adding mana.
Activate Ashnod's Altar 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 Early Harvest with the copy.
Resolve both copies of Regrowth, returning Emeritus of Abundance and Early Harvest from your graveyard to your hand.
Cast Early Harvest by paying its mana cost.
Pyromancer Ascension's second ability triggers, copying Early Harvest.
Resolve a copy of Early Harvest, untapping lands you control.
Activate those lands by tapping them, adding mana.
Resolve the remaining copy of Early Harvest, 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 Early Harvest.
Both of Pyromancer Ascension's abilities trigger.
In response, activate Ashnod's Altar 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.

Near-infinite creature ETB

Near-infinite creature LTB

Return all cards from your graveyard to your hand

Near-infinite magecraft triggers

Infinite death triggers

Infinite creature sacrifice triggers

Infinite untap of basic lands you control

Regrowth

Emeritus of Abundance // Regrowth

Pyromancer Ascension

Early Harvest

Ashnod's Altar

Cast Brass's Bounty by paying {6}{R}, creating at least eight Treasure tokens.
Activate two of those Treasure tokens by tapping and sacrificing them, adding two mana.
Cast a copy of Regrowth from exile by paying {1}{G}, targeting Brass's Bounty.
Pyromancer's Ascension's first ability triggers, allowing you to put a quest counter on it.
Resolve the copy of Regrowth, returning Brass's Bounty 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, activate your remaining Treasure tokens by tapping and sacrificing them, adding at least six mana.
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 Brass's Bounty by paying {6}{R}.
Pyromancer Ascension's second ability triggers, copying Brass's Bounty.
Resolve both copies of Brass's Bounty, creating at least sixteen Treasure tokens.
Activate those Treasure tokens by tapping and sacrificing them, adding at least sixteen mana.
Activate Thermopod by sacrificing Emeritus of Abundance, adding {R}.
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 Brass's Bounty with the copy.
Resolve both copies of Regrowth, returning Emeritus of Abundance and Brass's Bounty from your graveyard to your hand.
Cast Brass's Bounty by paying its mana cost.
Pyromancer Ascension's second ability triggers, copying Brass's Bounty.
Resolve both copies of Brass's Bounty, creating at least sixteen Treasure tokens.
Activate those Treasure tokens by tapping and sacrificing them, adding at least sixteen mana.
Cast Emeritus of Abundance by paying {2}{G}.
Cast a copy of Regrowth from exile by paying {1}{G}, targeting Brass's Bounty.
Both of Pyromancer Ascension's abilities trigger.
In response, activate Thermopod by sacrificing Emeritus of Ideation, adding {R}.
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 19.

Infinite colored mana

Thermopod

Brass's Bounty

Combos with "Pyromancer Ascension"