Altar of Dementia, Dualcaster Mage, and Ascend from Avernus

Prerequisites

• Altar of Dementia on the battlefield
• Dualcaster Mage in hand
• Ascend from Avernus in hand
• available

Steps

1. Cast Ascend from Avernus by paying
2. Holding priority, cast Dualcaster Mage by paying
3. Dualcaster Mage enters the battlefield, creating a copy of Ascend from Avernus
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 Ascend from Avernus, returning all creature and planeswalker cards with mana value three or less 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
• Infinite recursion of creature cards in your graveyard