Cast Spider-Man 2099 by paying {0}.
When Spider-Man 2099 enters, it triggers, returning itself from the battlefield to your hand.
Repeat.

Infinite LTB

Infinite ETB

Infinite storm count

Morophon, the Boundless

Spider-Man 2099, Miguel O'Hara

Fist of Suns

Activate Helga by tapping it, adding at least {U}{U}{U}{U}{U} that can only be spent to cast a creature spell with mana value 4 or greater or with {X} in its mana cost.
Cast Spider-Man 2099 by paying its mana cost.
Helga and Chakram Retriever trigger.
Resolve the Helga trigger, causing you to draw a card, gain 1 life, and put a +1/+1 counter on Helga.
Resolve the Chakram Retriever trigger, causing you to untap Helga.
When Spider-Man 2099 enters the battlefield, it triggers, returning it from the battlefield to your hand.
Repeat.

Infinite card draw

Near-infinite lifegain

Near-infinite lifegain triggers

Near-infinite ETB

Infinite draw triggers

Near-infinite storm count

Near-infinite LTB

Near-infinite +1/+1 counters on Helga

Near-infinite colored mana that can only be spent to cast creature spells with mana value 4 or greater or creature spells with X in their mana cost

Helga, Skittish Seer

Chakram Retriever

Cast Spider-Man 2099 by tapping a number of creatures and paying {0}.
When Spider-Man 2099 enters the battlefield, it and Intruder Alarm trigger.
Resolve the Spider-Man 2099 trigger, returning it from the battlefield to your hand.
Resolve the Intruder Alarm trigger, untapping all creatures.
Repeat.

Infinite mana creatures you control can produce

Infinite untap of all creatures

Dazzling Theater // Prop Room

Intruder Alarm

Activate Uthros, Titanic Godcore by paying {U} and tapping it, adding at least six {U}.
Cast Spider-Man 2099 by paying its mana cost.
When Spider-Man 2099 enters as a land due to Ashaya, it and Stone-Seeder Hierophant trigger.
Resolve the Spider-Man 2099 trigger, returning it from your graveyard to the battlefield.
Resolve the Stone-Seeder Hierophant trigger, untapping it.
Activate Stone-Seeder Hierophant by tapping it, untapping Uthros, Titanic Godcore.
Repeat.

Infinite mana lands you control can produce

Infinite green mana

Infinite blue mana

Infinite landfall triggers

Infinite untap of lands you control

Infinite untap of nontoken creatures you control

Infinite mana nontoken creatures you control can produce

Ashaya, Soul of the Wild

Stone-Seeder Hierophant

Uthros, Titanic Godcore

Activate Helga by tapping it, adding at least {U}{U}{U}{U}{U} that can only be spent to cast creature spells with mana value 4 or greater or creature spells with {X} in their mana cost.
Cast Spider-Man 2099 by paying {4}{U}.
Helga triggers, causing you to draw a card, gain 1 life and put a +1/+1 counter on Helga.
When Spider-Man 2099 enters the battlefield, it triggers, returning itself from the battlefield to your hand.
Activate Mind Over Matter by discarding a card, untapping Helga.
Repeat.

Infinite self-discard triggers

Infinite looting

Near-infinite untap of permanents you control

Near-infinite mana permanents you control can produce

Mind Over Matter

Cast Nethroi either from your hand or from the command zone for its mutate cost by paying {4}{G/W}{B}{B}, putting it under a non-Human creature you control.
Nethroi triggers, returning Spider-Man 2099 and Mitotic Slime from your graveyard to the battlefield.
When Spider-Man 2099 enters, it triggers, returning Nethroi from the battlefield to your hand.
Activate Phyrexian Altar twice by sacrificing Spider-Man 2099 and Mitotic Slime, adding {B}{B}.
When Mitotic Slime dies, it triggers, creating two 2/2 Ooze creature tokens.
Activate Phyrexian Altar twice by sacrificing the Oozes, adding {1}{G/W}.
When the Oozes die, they trigger, creating four 1/1 Ooze creature tokens.
Activate Phyrexian Altar three times by sacrificing three Oozes, adding {3}.
Repeat.

Combos with "Spider-Man 2099, Miguel O'Hara"