Dualcaster Mage, Not Dead After All, and Yahenni, Undying Partisan

Prerequisites

• Dualcaster Mage in hand
• Not Dead After All in hand
• Yahenni, Undying Partisan on the battlefield
• available

Steps

1. Cost Not Dead After All by paying , targeting a creature you control
2. Holding priority, cast Dualcaster Mage by paying
3. When Dualcaster Mage enters the battlefield, it triggers, copying Not Dead After All, with the copy targeting Dualcaster Mage
4. Resolve the copy of Not Dead After All
5. Holding priority, activate Yahenni by sacrificing Dualcaster Mage
6. When Dualcaster Mage dies, it triggers, returning itself from your graveyard to the battlefield with a Wicked Role token attached to it
7. When Dualcaster Mage enters the battlefield, it triggers, copying Not Dead After All, with the copy targeting Dualcaster Mage
8. Resolve the copy of Not Dead After All
9. Resolve the Yahenni ability
10. Activate Yahenni by sacrificing Dualcaster Mage
11. When Dualcaster Mage dies, it and the Wicked Role token attached to it trigger
12. Resolve the Wicked Role trigger, causing each opponent to lose 1 life
13. Resolve the Dualcaster Mage trigger, returning it from your graveyard to the battlefield with a Wicked Role token attached to it
14. Repeat from step 7

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite lifeloss
• Infinite magecraft triggers