Animation Module + Sigil Captain + Phyrexian Altar

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, Sigil Captain triggers, putting two +1/+1 counters on the Servo.
4. 4Animation Module triggers, holding priority, activate Phyrexian Altar by sacrificing the Servo, adding .
5. 5Resolve the Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token.
6. 6Repeat from step 3.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite death triggers