Dualcaster Mage + Yahenni, Undying Partisan + Undying Malice

Prerequisites

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Steps

1. 1Cast Undying Malice by paying its mana cost.
2. 2Holding priority, cast Dualcaster Mage by paying its mana cost.
3. 3When Dualcaster Mage enters, it triggers, copying Undying Malice, with the copy targeting Dualcaster Mage.
4. 4Resolve the copy of Undying Malice.
5. 5Holding priority, activate Yahenni by sacrificing Dualcaster Mage.
6. 6When Dualcaster Mage dies, it triggers, returning it from your graveyard to the battlefield.
7. 7Repeat from step 3.
8. 8Resolve all Yahenni abilities from step 5.

Effects

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