Requires

Animation Module must be on the battlefield. Serra Redeemer must be on the battlefield. Ashnod's Altar must be on the battlefield. You have a way to put a +1/+1 counter on a creature you control. Mana needed:

Steps

1. Put a +1/+1 counter on a creature you control.
2. Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token.
3. When the Servo enters the battlefield, Serra Redeemer triggers, putting two +1/+1 counters on the Servo.
4. Animation Module triggers, holding priority, activate Ashnod's Altar by sacrificing the Servo, adding .
5. Resolve the Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token.
6. Repeat from step 3.

Results