Carrion Feeder, Kiki-Jiki, Mirror Breaker, and Prowling Geistcatcher

Prerequisites

• Carrion Feeder on the battlefield
• Kiki-Jiki, Mirror Breaker on the battlefield
• Prowling Geistcatcher on the battlefield

Steps

1. Activate Kiki-Jiki by tapping it, creating a token copy of Prowling Geistcatcher with haste
2. Activate Carrion Feeder by sacrificing Kiki-Jiki
3. When Kiki-Jiki dies, the nontoken and token Prowling Geistcatcher's first abilities trigger
4. Resolve the token Prowling Geistcatcher's trigger, exiling Kiki-Jiki from your graveyard
5. Resolve the nontoken Prowling Geistcatcher's trigger, doing nothing
6. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
7. Activate Carrion Feeder by sacrificing the Prowling Geistcatcher token
8. When the token Prowling Geistcatcher dies, its second ability and the nontoken Prowling Geistcatcher's first ability triggers
9. Resolve the nontoken Prowling Geistcatcher trigger, putting a +1/+1 counter on it
10. Resolve the token Prowling Geistcatcher trigger, returning Kiki-Jiki from exile to the battlefield
11. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
12. Repeat

Results

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