Animation Module + Phyrexian Altar + Wildwood Mentor

Prerequisites

• You have a way to put a +1/+1 counter on a creature you control.

Steps

1. 1Put a +1/+1 counter on a creature you control.
2. 2Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token.
3. 3When the Servo enters the battlefield, Wildwood Mentor's first ability triggers.
4. 4Holding priority, activate Phyrexian Altar by sacrificing the Servo, adding .
5. 5Resolve the Wildwood Mentor trigger, putting a +1/+1 counter on it.
6. 6Repeat from step 2.

Effects

• Infinite +1/+1 counters on a creature
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers