Ratadrabik of Urborg, Leyline of Singularity, and Carrion Feeder

Prerequisites

• Ratadrabik of Urborg on the battlefield
• Leyline of Singularity on the battlefield
• Carrion Feeder on the battlefield
• You control at least one additional creature

Steps

1. Activate Carrion Feeder by sacrificing any other creature you control
2. The creature dies, triggering Ratadrabik, creating a token copy of the creature that is a 2/2 legendary Zombie in addition to its other types
3. Resolve the Carrion Feeder ability, putting a +1/+1 counter on it
4. Repeat

Results

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