Activate Bloom Tender by tapping it, adding at least {B}{R}{G}.
Activate Phyrexian Altar twice by sacrificing Bloom Tender and Slimefoot and Squee, adding two mana of any color(s).
Activate Slimefoot and Squee by paying {1}{B}{R}{G} and sacrificing a Saproling, returning Slimefoot and Squee and Bloom Tender to the battlefield from your graveyard.
When Slimefoot and Squee and Bloom Tender enter the battlefield, Chainer triggers twice and Slimefoot and Squee triggers once.
Resolve both Chainer triggers, giving Slimefoot and Squee and Bloom Tender haste.
Resolve the Slimefoot and Squee trigger, creating a 1/1 Saproling creature token.
Repeat.

Infinite colored mana

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite sacrifice triggers

Slimefoot and Squee

Bloom Tender

Phyrexian Altar

Chainer, Nightmare Adept

Activate Coretapper's first ability by tapping it, putting a charge counter on Magistrate's Scepter.
Activate Coretapper's second ability by sacrificing it, putting two charge counters on Magistrate's Scepter.
Activate Magistrate's Scepter's second ability by tapping it and removing three charge counters from it, taking an extra turn after this one.
During your next extra turn's main phase, activate Chainer by discarding a card, allowing you cast Coretapper from your graveyard this turn.
Cast Coretapper by paying {2}.
When Coretapper enters the battlefield, Chainer triggers, giving Coretapper haste until your next turn.
Repeat each turn.

Infinite turns

Coretapper

Magistrate's Scepter

Activate Marvin using Chainer's ability by discarding a card, allowing you to cast a creature spell from your graveyard this turn.
Activate Ashnod's Altar by sacrificing Marvin, adding {C}{C}.
Cast Marvin from your graveyard by paying {2}.
When Marvin enters the battlefield, Chainer triggers, giving Marvin haste until end of turn.
Activate Marvin using Loran's ability by tapping it, causing you and an opponent to draw a card.
Repeat.

Infinite self-discard triggers

Near-infinite ETB

Infinite draw triggers

Near-infinite storm count

Near-infinite LTB

Infinite rummaging

Near-infinite death triggers

Near-infinite sacrifice triggers

Infinite card draw for target opponent

Infinite draw triggers for target opponent

Near-infinite draw triggers for target opponent

Near-infinite card draw for target opponent

Loran of the Third Path

Marvin, Murderous Mimic

Ashnod's Altar

Activate Chainer by discarding a card, allowing you to cast a creature spell from your graveyard this turn.
Cast Sidisi from your graveyard by paying {3}{B}{B}.
When Sidisi enters the battlefield, its exploit ability and Chainer trigger.
Resolve the Chainer trigger, giving Sidisi haste until end of turn.
Resolve the Sidisi trigger, causing you to sacrifice Sidisi.
Sidisi's second ability triggers, causing you to search your library for Beacon of Tomorrows and put it into your hand.
Cast Beacon of Tomorrows by paying {6}{U}{U}, causing you to take an extra turn after this one and shuffle Beacon of Tomorrows into your library.
Repeat each turn.

Sidisi, Undead Vizier

Beacon of Tomorrows

Activate Chainer by discarding a card, allowing you to cast a creature spell from your graveyard this turn.
Cast Sidisi from your graveyard by paying {3}{B}{B}.
When Sidisi enters the battlefield, its exploit ability and Chainer trigger.
Resolve the Chainer trigger, giving Sidisi haste until end of turn.
Resolve the Sidisi trigger, causing you to sacrifice Sidisi.
Sidisi's second ability triggers, causing you to search your library for Nexus of Fate and put it into your hand.
Cast Nexus of Fate by paying {5}{U}{U}, causing you to take an extra turn after this one and shuffle Nexus of Fate into your library.
Repeat each turn.

Nexus of Fate

Discard a card to activate Unstable Shapeshifter's ability from Chainer, allowing you to cast a creature spell from your graveyard this turn.
Cast a creature spell from your graveyard by paying {0}.
Due to Infinite Reflection, that creature enters the battlefield as a copy of Unstable Shifter copying Chainer.
Put that creature in the graveyard due to the legend rule.
That creature entering the battlefield and dying triggers its own Chainer ability, Unstable Shapeshifter's Chainer ability, and Unstable Shapeshifter's original ability.
Resolve the two Chainer triggers, failing to grant anything haste.
Resolve the Liliana trigger, drawing a card.
Resolve the Unstable Shapeshifter ability, causing it to become a new copy of Chainer that has not yet activated its ability this turn.
Repeat.

Combos with "Chainer, Nightmare Adept"