Activate your commander by paying {1} and sacrificing another creature or artifact, dealing 1 damage to an opponent.
Malcolm triggers, creating two Treasure tokens.
Activate a Treasure token by tapping and sacrificing it, adding {1}.
Repeat.

Infinite damage

Malcolm, Keen-Eyed Navigator

Street Urchin

Xorn

Activate your commander by paying {1} and sacrificing another creature or artifact, dealing 1 damage to an opponent.
Malcolm triggers, creating a Treasure, a Food, and a Clue token.
Activate the Treasure token by tapping and sacrificing it, adding {1}.
Repeat.

Infinite Clue tokens

Infinite Food tokens

Academy Manufactor

Activate your commander by paying {1} and sacrificing another creature or artifact, dealing 1 damage to an opponent.
Malcolm triggers, creating a Treasure token.
Activate Urza's first ability by tapping the Treasure, adding {U}.
Repeat.

Urza, Lord High Artificer

Activate Malcolm by paying {1} and sacrificing another artifact or creature, targeting an opponent.
Ashnod triggers, copying Malcolm's ability, targeting an opponent.
Resolve a Malcolm ability, dealing 1 damage to an opponent.
Malcolm triggers, creating a Treasure token.
Repeat from step 3 one additional time.
Activate a Treasure by tapping and sacrificing it, adding {1}.
Repeat.

Vial Smasher the Fierce

Ashnod the Uncaring

Activate your commander by paying {1} and sacrificing a Clue or Food.
Crime Novelist and Jenny Flint trigger, as well as Lonis' second ability if the sacrificed artifact was a Clue.
Resolve the Crime Novelist trigger, putting a +1/+1 counter on it and adding {R}.
Resolve the Lonis trigger, if applicable, putting a +1/+1 counter on any other creature you control.
Resolve the Jenny Flint trigger, putting a +1/+1 counter on Lonis.
Lonis' first ability triggers, causing you to create a Clue artifact token.
Resolve the ability from step 1, dealing 1 damage to any target.
Repeat.

Combos with "Street Urchin"