Donatello, the Brains + Animation Module + Mutagen Man, Living Ooze + 1 more
Infinite ETB, Infinite creature tokens
Activate a Mutagen by paying 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 .
Resolve the Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token and a Mutagen token.
Repeat.
Component Cards
How It Works
Activate a Mutagen by paying 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 .
Resolve the Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token and a Mutagen token.
Repeat.