Cast any other Eldrazi except Drowner of Truth by paying its mana cost, triggering Ulalek.
Holding priority, cast Drowner of Truth by paying {4}{C}{G/U}{G/U}.
Drowner of Truth and Ulalek trigger.
Resolve the Ulalek trigger, causing you to pay {C}{C} to copy all spells you control and then copy all activated and triggered abilities you control, ensuring to put Drowner of Truth's trigger on top of Ulalek's trigger.
Resolve the copy of Drowner of Truth's trigger, creating two 0/1 Eldrazi Spawn creature tokens.
Activate the Eldrazi Spawns by sacrificing them, adding {C}{C}.
Resolve the copy of Ulalek's trigger, causing you to pay {C}{C} to copy all spells you control and then copy all activated and triggered abilities you control, ensuring to put Drowner of Truth's trigger on top of Ulalek's trigger.
Repeat from step 5.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite storm count

Infinite creature tokens

Infinite copies of abilities you control on the stack

Infinite copies of the cast Eldrazi

Ulalek, Fused Atrocity

Drowner of Truth // Drowned Jungle

Vernal Equinox

Activate Mindslaver by paying {4}, tapping and sacrificing it, causing you to gain control of target opponent during their next turn.
During the opponent's turn, cast Lethal Vapors by paying {2}{B}{B}.
As the opponent, activate Lethal Vapors by paying {0} an arbitrarily large number of times, causing that opponent to skip that many turns.

Target opponent skips all their future turns

Mindslaver

Lethal Vapors

Activate any number of basic lands by tapping them, adding at least {3}{U}{R}.
Cast Early Harvest by paying {1}{G}{G}.
Holding priority, activate Rootha by paying {2} and returning it from the battlefield to your hand, copying Early Harvest
Resolve the Early Harvest copy, untapping all basic lands you control.
Activate any number of basic lands by tapping them, adding at least {3}{U}{R}.
Cast Rootha by paying {1}{U}{R}.
Repeat from step 3.

Infinite magecraft triggers

Infinite mana basic lands you control can produce

Infinite untap of basic lands you control

Rootha, Mercurial Artist

Early Harvest

Activate any number of lands by tapping them, adding at least {3}{U}{R}.
Cast Rude Awakening by paying {4}{G}.
Holding priority, activate Rootha by paying {2} and returning it from the battlefield to your hand, copying Rude Awakening.
Resolve the Rude Awakening copy, untapping all lands you control.
Activate any number of lands by tapping them, adding at least {3}{U}{R}.
Cast Rootha by paying {1}{U}{R}.
Repeat from step 3.

Infinite mana lands you control can produce

Infinite untap of lands you control

Rude Awakening

Cast Brass's Bounty by paying {6}{R}.
Holding priority, activate Rootha by paying {2} and returning it from the battlefield to your hand, copying Brass's Bounty.
Resolve the Brass's Bounty copy, creating at least six Treasure tokens.
Activate five Treasure tokens by tapping and sacrificing them, adding {3}{U}{R}.
Cast Rootha by paying {1}{U}{R}.
Repeat from step 2.

Infinite colored mana

Infinite Treasure tokens

Brass's Bounty

On the end step prior to your turn, cast Storvald either from your hand or from the command zone by paying {4}{G}{W}{U} and commander tax, if applicable.
When Storvald enters the battlefield, it triggers, causing Tree or Redemption's power and toughness to become 1 until end of turn.
Activate Tree of Redemption by tapping it, causing your life total to become 1.
At the beginning of your upkeep, Near-Death Experience triggers, causing you to win the game.

Win the game at the beginning of your next upkeep

Storvald, Frost Giant Jarl

Tree of Redemption

Near-Death Experience

Activate Mindslaver by paying {4} and tapping it, causing you to gain control of target opponent during their next turn.
During the opponent's turn, cast Aether Storm by paying {3}{U}.
As the opponent, activate Aether Storm by paying 4 life.
Repeat step 3 until the opponent has 3 or less life remaining.

Near-infinite lifeloss for target opponent

Aether Storm

Cast Universal Automaton from your hand or graveyard by paying {1}.
Activate Krark-Clan Ironworks by sacrificing Universal Automaton, adding {C}{C}.
When Universal Automaton dies, Zask triggers.
Holding priority, cast Universal Automaton from your graveyard by paying {1}.
Resolve the Zask trigger, causing you to mill two cards.
Repeat from step 2.

Infinite self-mill

Infinite colorless mana

Zask, Skittering Swarmlord

Universal Automaton

Krark-Clan Ironworks

Cast Seething Song by paying {2}{R}.
Storm-Kiln Artist triggers, creating a Treasure token.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Holding priority, activate Rootha by paying {2} and returning it from the battlefield to your hand, copying Seething Song.
Storm-Kiln Artist triggers, creating a Treasure token.
Resolve the Seething Song copy, adding {R}{R}{R}{R}{R}.
Activate a Treasure by tapping and sacrificing it, adding {U}.
Cast Rootha by paying {1}{U}{R}.
Repeat from step 4.

Infinite red mana

Seething Song

Storm-Kiln Artist

Cast Jeska's Will by paying {2}{R}.
Storm-Kiln Artist triggers, creating a Treasure token.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Holding priority, activate Rootha by paying {2} and returning it from the battlefield to your hand, copying Jeska's Will.
Storm-Kiln Artist triggers, creating a Treasure token.
Resolve the Jeska's Will copy, adding at least {R}{R}{R}{R}.
Activate a Treasure by tapping and sacrificing it, adding {U}.
Cast Rootha by paying {1}{U}{R}.
Repeat from step 4.

Exile your library with the ability to play the exiled cards until end of turn

Jeska's Will

Combos with "Vernal Equinox"