Xathrid Necromancer, Xenograft, and Altar of Dementia

Prerequisites

• Xathrid Necromancer on the battlefield
• Xenograft on the battlefield
• Altar of Dementia on the battlefield
• "Human" chosen with Xenograft
• You control at least one other creature

Steps

1. Activate Altar of Dementia by sacrificing any other creature
2. Xathrid Necromancer triggers, creating a 2/2 Zombie 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 death triggers
• Infinite ETB
• Infinite LTB
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill