Tale of Katara and Toph + Animation Module + Insidious Roots + Alibou, Ancient Witness

Tale of Katara and Toph

Animation Module

Insidious Roots

Alibou, Ancient Witness

How it works

1. Activate an artifact creature token by tapping it, adding 1.
2. The creature's ability granted to it by Tale of Katara and Toph triggers, putting a +1/+1 counter on the creature.
3. Animation Module triggers, causing you to pay 1 to create a 1/1 Servo artifact creature token.
4. Repeat.