Flayer of the Hatebound, Solemnity, and Altar of Dementia

Prerequisites

• Flayer of the Hatebound on the battlefield
• Solemnity on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Flayer of the Hatebound
2. Flayer of the Hatebound's undying ability triggers, returning it from your graveyard to the battlefield without a +1/+1 counter on it due to Solemnity
3. Flayer of the Hatebound enters the battlefield, dealing damage equal to its power to any target
4. Resolve the Altar of Dementia ability, causing target player to mill cards equal to Flayer of the Hatebound's power
5. Repeat

Results

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