Prowling Geistcatcher, Animation Module, and Phyrexian Altar

Prerequisites

• Prowling Geistcatcher on the battlefield
• Animation Module on the battlefield
• Phyrexian Altar on the battlefield
• You control at least one creature token

Steps

1. Activate Phyrexian Altar by sacrificing a creature token, adding
2. Prowling Geistcatcher triggers, putting a +1/+1 counter on itself
3. Animation Module triggers, causing you to pay to create a 1/1 Servo artifact creature token
4. Repeat

Results

• Infinite +1/+1 counters on Prowling Geistcatcher
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers