Cast Mutagen Man by paying {8}{G}{G} minus {1} for each Mutagen you control.
When Mutagen Man enters, it triggers, creating a number of Mutagen tokens.
At the beginning of your next upkeep, Mechanized Production triggers, creating a copy of the artifact it's attached to and causing you to win the game.

Win the game at the beginning of your next upkeep

Mutagen Man, Living Ooze

Mechanized Production

Put a +1/+1 counter on Scurry Oak.
Scurry Oak triggers, creating a creature token and a Mutagen token due to Donatello.
Activate the Mutagen by paying {0} due to Mutagen Man, tapping and sacrificing it, putting a +1/+1 counter on Scurry Oak.
Repeat from step 2.

Infinite +1/+1 counters on a creature

Infinite ETB

Infinite creature tokens

Donatello, the Brains

Scurry Oak

Activate Chrome Dome by paying {5}, creating a token copy of Basalt Monolith.
Activate the Basalt Monolith token's first ability by tapping it, adding {C}{C}{C}.
Activate the Basalt Monolith token's second ability by paying {2} due to Mutagen Man, untapping it.
Repeat from step 2.

Infinite LTB

Infinite colorless mana

Infinite copies of artifacts you control with haste

Infinite creature tokens with haste

Infinite death triggers

Infinite sacrifice triggers

Basalt Monolith

Chrome Dome

Activate Cogwork Assembler by paying {7}, creating a token copy of Basalt Monolith.
Activate the Basalt Monolith token's first ability by tapping it, adding {C}{C}{C}.
Activate the Basalt Monolith token's second ability by paying {2} due to Mutagen Man, untapping it.
Repeat from step 2.

Cogwork Assembler

Activate a Mutagen by paying {0} due to Mutagen Man, tapping and sacrificing it, putting a +1/+1 counter on Crystalline Crawler.
Animation Module triggers. Holding priority, activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {1}.
Resolve the Animation Module trigger, causing you to pay {1} to create a 1/1 Servo artifact creature token and a Mutagen token.
Repeat.

Animation Module

Crystalline Crawler

Activate a Mutagen by paying {0} due to Mutagen Man, tapping and sacrificing it, putting a +1/+1 counter on Workhorse.
Animation Module triggers. Holding priority, activate Workhorse by removing a +1/+1 counter from it, adding {C}.
Resolve the Animation Module trigger, causing you to pay {1} to create a 1/1 Servo artifact creature token and a Mutagen token.
Repeat.

Combos with "Mutagen Man, Living Ooze"