Animation Module, Intruder Alarm, and Cathars' Crusade

Prerequisites

• Animation Module on the battlefield
• Intruder Alarm on the battlefield
• Cathars' Crusade on the battlefield
• Creatures you control can tap to produce at least
• You have a way to cause a creature to enter the battlefield without a -1/-1 counter on it

Steps

1. Cause a creature to enter the battlefield
2. When the creature enters the battlefield, Intruder Alarm and Cathars' Crusade trigger
3. Resolve the Intruder Alarm trigger, untapping all creatures
4. Holding priority, activate a mana-producing creature by tapping it, adding at least
5. Resolve the Cathars' Crusade trigger, putting a +1/+1 counter on each creature you control
6. Animation Module triggers for each counter placed
7. Resolve all but the last trigger, choosing not to pay
8. Resolve the final trigger, causing you to pay to create a 1/1 Servo artifact creature token
9. Repeat from step 2

Results

• Infinite creature tokens
• Infinite ETB
• Infinite mana creatures you control can produce
• Infinite untap of all creatures
• Infinite +1/+1 counters