Gravecrawler, Rooftop Storm, and Carrion Feeder

Prerequisites

• Gravecrawler on the battlefield
• Rooftop Storm on the battlefield
• Carrion Feeder on the battlefield

Steps

1. Activate Carrion Feeder's ability by sacrificing Gravecrawler, putting a +1/+1 counter on Carrion Feeder
2. Cast Gravecrawler from your graveyard by paying
3. Repeat

Results

• Infinite +1/+1 counters on Carrion Feeder
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite storm count