Xavier Sal, Infested Captain, Animation Module, Thornbite Staff, and Crystalline Crawler

Prerequisites

• Xavier Sal, Infested Captain on the battlefield
• Animation Module on the battlefield
• Thornbite Staff on the battlefield
• Crystalline Crawler on the battlefield

Steps

1. Activate Xavier Sal's second ability by tapping it and sacrificing a creature
2. When the creature dies, Xavier Sal triggers, untapping Xavier Sal
3. Resolve the Xavier Sal ability from step 1, putting a +1/+1 counter on Crystalline Crawler
4. Animation Module triggers, holding priority, activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding
5. Resolve the Animation Module trigger, causing you to pay to create a 1/1 Servo artifact creature token
6. Repeat
7. If you control another creature with a +1/+1 counter on it, you will get infinite +1/+1 counters among creatures you control, and you may instead use Xavier Sal's first ability to get infinite copies of creature tokens you control

Results

• Infinite copies of creature tokens you control
• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite proliferate
• Infinite sacrifice triggers