Altar of Dementia, Dualcaster Mage, and Stir the Grave

Prerequisites

• Altar of Dementia on the battlefield
• Dualcaster Mage in hand
• Stir the Grave in hand
• available

Steps

1. Cast Stir the Grave by paying
2. Holding priority, cast Dualcaster Mage by paying its mana cost
3. When Dualcaster Mage enters, it triggers, targeting Stir the Grave
4. Holding priority, activate Altar of Dementia by sacrificing Dualcaster Mage
5. Resolve the Dualcaster Mage trigger, copying Stir the Grave Resolve the Stir the Grave copy, returning Dualcaster Mage from your graveyard to the battlefield
6. Repeat from step 3

Results

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