Aerie Ouphes, The Great Henge, and Altar of Dementia

Prerequisites

• Aerie Ouphes on the battlefield
• The Great Henge on the battlefield
• Altar of Dementia on the battlefield

Steps

1. Activate Altar of Dementia by sacrificing Aerie Ouphes
2. Aerie Ouphes' persist ability triggers, returning it from your graveyard to the battlefield
3. Aerie Ouphes enters the battlefield, triggering The Great Henge, putting one +1/+1 counter on Aerie Ouphes and causing you to draw a card
4. Resolve the Altar of Dementia's ability, causing target player to mill two cards
5. Repeat

Results

• Infinite card draw
• Infinite ETB
• Infinite LTB
• Infinite mill