Ygra, Eater of All, Experimental Confectioner, and Altar of Dementia

Prerequisites

• Ygra, Eater of All on the battlefield
• Experimental Confectioner on the battlefield
• Altar of Dementia on the battlefield
• You control at least one additional creature

Steps

1. Activate Altar of Dementia by sacrificing another creature
2. When the creature dies as a Food due to Ygra, Experimental Confectioner's second ability triggers, causing you to create a 1/1 Rat creature token
3. Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power
4. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill
• Infinite +1/+1 counters on Ygra