Living Death, Dualcaster Mage, and Altar of Dementia

Prerequisites

• Living Death in hand
• Dualcaster Mage in hand
• Altar of Dementia on the battlefield
• available

Steps

1. Cast Living Death by paying
2. Holding priority, cast Dualcaster Mage by paying
3. Dualcaster Mage enters the battlefield, copying Living Death
4. Holding priority, Activate Altar of Dementia by sacrificing Dualcaster Mage, causing target player to mill two cards
5. Resolve the Living Death copy, exiling all creatures from graveyard, then sacrifices all creatures, then putting all cards exiled this way onto the battlefield
6. Repeat from step 3

Results

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