Corpse Dance, Dualcaster Mage, and Altar of Dementia

Prerequisites

• Corpse Dance in hand
• Dualcaster Mage in hand
• Altar of Dementia on the battlefield
• available

Steps

1. Cast Corpse Dance by paying
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, creating a copy of Corpse Dance
4. Activate Altar of Dementia by sacrificing Dualcaster Mage, causing target player to mill cards equal to Dualcaster Mage's power
5. Resolve the copy of Corpse Dance, returning Dualcaster Mage from your graveyard to the battlefield
6. Repeat from step 3

Results

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