Cast Emrakul by paying {15} and commander tax, if applicable.
Emrakul triggers, causing you to get an extra turn after this one.
Activate Erratic Portal by paying {1} and tapping it, choosing not to pay and return Emrakul from the battlefield to your hand.
Repeat each turn.

Infinite turns

Lock

Erratic Portal

Emrakul, the Aeons Torn

Activate Phyrexian Altar by sacrificing Emrakul, adding {1}.
When Emrakul dies, it, Heirloom Blade and Deathrender trigger.
Resolve the Emrakul trigger, shuffling it into your library.
Resolve the Heirloom Blade trigger, causing you to reveal cards from the top of your library until you reveal a creature that shares a card type with Emrakul and put it into your hand
Resolve the Deathrender trigger, putting the creature from your hand onto the battlefield and attaching Deathrender to it.
Activate Heirloom Blade's equip ability by paying {1}, attaching it to the creature.
Repeat.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Deathrender

Heirloom Blade

Phyrexian Altar

Cast Emrakul for {15}.
Emrakul triggers, granting you an extra turn after this one.
Tap Karakas to return Emrakul to your hand.

Karakas

Activate Altar of Dementia by sacrificing Emrakul.
Emrakul and Verdant Succession trigger.
Resolve the Emrakul trigger, shuffling your graveyard into your library.
Resolve the Verdant Succession trigger, searching your library for Emrakul, putting it onto the battlefield and shuffling your library.
Resolve the Altar of Dementia ability from step 1, causing target player to mill cards equal to Emrakul's power.
Repeat.

Infinite mill

Infinite self-mill

Verdant Succession

Altar of Dementia

Painter's Servant

Activate Ashnod's Altar by sacrificing Emrakul, adding {C}{C}.
Emrakul and Verdant Succession trigger.
Resolve the Emrakul trigger, shuffling your graveyard into your library.
Resolve the Verdant Succession trigger, searching your library for Emrakul, putting it onto the battlefield and shuffling your library.
Repeat.

Infinite colorless mana

Ashnod's Altar

Activate Phyrexian Altar by sacrificing Emrakul, adding one mana of any color.
Emrakul and Verdant Succession trigger.
Resolve the Emrakul trigger, shuffling your graveyard into your library.
Resolve the Verdant Succession trigger, searching your library for Emrakul, putting it onto the battlefield and shuffling your library.
Repeat.

Infinite colored mana

Discard Emrakul if it is in your hand, or kill it if it is on the battlefield.
Emrakul triggers, shuffling your graveyard into your library.
Cast Inverter of Truth by paying {2}{B}{B}.
When Inverter of Truth enters the battlefield, it triggers, exiling your library.
Cast Thassa's Oracle by paying {U}{U}.
When Thassa's Oracle enters the battlefield, it triggers, causing you to win the game.

Exile your library and graveyard

Win the game

Inverter of Truth

Thassa's Oracle

Tap Basalt Monolith for {3}.
Pay {3} to untap Basalt monolith.
Mill 1 with Mesmeric Orb.
Repeat until you mill Nullpriest of Oblivion and Syr Konrad shuffling when you do not mill them using the Titan.
Cast and kick Nullpriest of Oblivion with Lurrus of the Dream-Den, bringing Syr Konrad to the battlefield.
Repeat Milling until you mill the Titan, dealing damage with Syr Konrad.

Infinite damage

Lurrus of the Dream-Den

Mesmeric Orb

Basalt Monolith

Nullpriest of Oblivion

Syr Konrad, the Grim

Activate Captain Sisay by tapping it, searching your library for Emrakul and putting it into your hand.
Activate Mind Over Matter by discarding Emrakul.
Emrakul triggers, shuffling your graveyard into your library.
Resolve the Mind Over Matter ability, untapping Captain Sisay.
Repeat.

Infinite self-discard triggers

Captain Sisay

Mind Over Matter

Increase Atla's toughness by at least one.
Activate Mirror Entity an arbitrarily large number of times by paying a total of {0}.
Resolve the first Mirror Entity ability, causing all creatures you control to have base power and toughness 0/0 and gain all creature types until end of turn.
All creatures you control except Atla die as a state-based action due to having zero toughness.
If Emrakul died this way, it triggers, shuffling your graveyard into your library.
Atla triggers once for each creature that died.
Resolve the first Atla trigger, revealing cards from the top of your library until you reveal a creature card, then putting the creature card onto the battlefield and all other revealed cards on the bottom of your library.
Repeat step 7 for each remaining Atla trigger.
Repeat from step 3 for each remaining Mirror Entity ability.

Atla Palani, Nest Tender

Mirror Entity

Tap Seeker of Skybreak to untap itself.
Mill 1 with Mesmeric Orb.
Repeat until you mill Nullpriest of Oblivion and Syr Konrad shuffling when you do not mill them using the Titan.
Cast and kick Nullpriest of Oblivion with Lurrus of the Dream-Den, bringing Syr Konrad to the battlefield.
Repeat Milling until you mill the Titan, dealing damage with Syr Konrad.

Seeker of Skybreak

Tap Alphetto Alchemist to untap itself.
Mill 1 with Mesmeric Orb.
Repeat until you mill Nullpriest of Oblivion and Syr Konrad shuffling when you do not mill them using the Titan.
Cast and kick Nullpriest of Oblivion with Lurrus of the Dream-Den, bringing Syr Konrad to the battlefield.
Repeat Milling until you mill the Titan, dealing damage with Syr Konrad.

Combos with "Emrakul, the Aeons Torn"