Activate Makeshift Munitions by paying {1} and sacrificing another creature or artifact, dealing 1 damage to Smaug.
Smaug triggers, creating two Treasure tokens due to Xorn.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Repeat.

Infinite artifact ETB

Infinite artifact LTB

Infinite artifact sacrifice triggers

Smaug the Impenetrable

Makeshift Munitions

Xorn

Activate Sol Ring by tapping it, adding {C}{C}.
Activate Makeshift Munitions by paying {1} and sacrificing Sol Ring, dealing 1 damage to any target.
Activate Emry by tapping it, allowing you to cast Sol Ring from your graveyard this turn.
Cast Sol Ring from your graveyard by paying {1}.
Jeskai Ascendancy's first and second abilities trigger.
Resolve the first trigger, causing creatures you control to get +1/+1 until end of turn and untapping all creatures you control.
Resolve the second trigger, allowing you to loot.
Repeat.

Infinite damage

Infinite draw triggers

Infinite looting

Infinitely large creatures you control until end of turn

Infinite mana creatures you control can produce

Infinite self-discard triggers

Infinite storm count

Infinite untap of creatures you control

Emry, Lurker of the Loch

Jeskai Ascendancy

Sol Ring

Activate Makeshift Munitions by paying {1} and sacrificing another creature or artifact, dealing 3 damage to Smaug due to Fiery Emancipation.
Smaug triggers, creating three Treasure tokens.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Repeat.

Fiery Emancipation

Activate Mana Vault by tapping it, adding {C}{C}{C}.
Activate Makeshift Munitions by paying {1} and sacrificing Mana Vault, dealing 1 damage to any target.
Activate Emry by tapping it, allowing you to cast Mana Vault from your graveyard this turn.
Cast Mana Vault from your graveyard by paying {1}.
Jeskai Ascendancy's first and second abilities trigger.
Resolve the first trigger, causing creatures you control to get +1/+1 until end of turn and untapping all creatures you control.
Resolve the second trigger, allowing you to loot.
Repeat.

Infinite colorless mana

Mana Vault

Combos with "Makeshift Munitions"