Cast Invulnerability with buyback by paying {0} due to Aang's cost reduction, returning Invulnerability to your hand.
Repeat.

Infinite storm count

Infinite magecraft triggers

Avatar Aang // Aang, Master of Elements

Invulnerability

Cast Invulnerability with buyback by paying {W}.
Storm-Kiln Artist triggers, creating a Treasure token.
Resolve Invulnerability.
Activate the Treasure by tapping and sacrificing it, adding {W}.
Repeat.

Samut, the Driving Force

Storm-Kiln Artist

Activate Will by tapping it, causing white and blue spells you cast this turn to cost at least {4} less.
Activate a creature by tapping it, adding {W}.
Cast Invulnerability with buyback by paying {W}.
Chakram Retriever triggers, untapping the mana-producing creature.
Resolve Invulnerability.
Repeat from step 2.

Chakram Retriever

Will, Scion of Peace

Activate Empowered Autogenerator by tapping it, putting a charge counter on it and adding {W} for each charge counter on it.
Cast Invulnerability with buyback by paying {4}{W}.
Shantotto triggers, giving it +5/+0 until end of turn and causing you to draw a card.
Resolve Invulnerability.
Activate Mind Over Matter by discarding a card, untapping Empowered Autogenerator.
Repeat.

Infinite self-discard triggers

Infinite draw triggers

Infinite looting

Near-infinite storm count

Near-infinite magecraft triggers

Near-infinite colored mana

Near-infinite charge counters on a permanent

Near-infinitely powerful creature until end of turn

Shantotto, Tactician Magician

Mind Over Matter

Empowered Autogenerator

Cast Invulnerability with buyback by paying {4}{W}, returning it to your hand.
At the beginning of your combat phase, The Thing's first ability triggers, putting four +1/+1 counters on it.
Declare The Thing as an attacker. Its second ability triggers, causing you to pay {R}{G}{W}{U} to double the number of +1/+1 counters on it.
Activate The Thing using Sage of Hours' ability by removing all +1/+1 counters from it, causing you to take an extra turn after this one.
Repeat each turn.

Combos with "Invulnerability"