Berta, Wise Extrapolator + Animation Module + Yotian Dissident

Berta, Wise Extrapolator

Animation Module

Yotian Dissident

How it works

1. Put a +1/+1 counter on Berta.
2. Berta and Animation Module trigger.
3. Resolve the Berta trigger, adding 1.
4. Resolve the Animation Module trigger, causing you to pay 1 to create a 1/1 Servo artifact creature token.
5. When the Servo enters, Yotian Dissident triggers, putting a +1/+1 counter on Berta.
6. Repeat from step 2.