Ratadrabik of Urborg, Leyline of Singularity, and Altar of Dementia

Prerequisites

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

Steps

1. Activate Altar of Dementia 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 Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
4. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill