Tenacious Dead + Pitiless Plunderer + Sifter of Skulls + Yahenni, Undying Partisan

Tenacious Dead

Pitiless Plunderer

Sifter of Skulls

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Tenacious Dead.
2. When Tenacious Dead dies, it, Sifter of Skulls, and Pitiless Plunderer trigger.
3. Resolve the Pitiless Plunderer trigger, creating a Treasure token.
4. Resolve the Sifter of Skulls trigger, creating a creature token.
5. In response to the remaining trigger, activate Yahenni by sacrificing the creature token.
6. When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token.
7. Resolve the Yahenni ability from step 5.
8. Activate two Treasure tokens by tapping and sacrificing them, adding .
9. Resolve the Tenacious Dead trigger, paying 1 to return it to the battlefield from your graveyard.
10. Resolve the Yahenni ability from step 1.
11. Repeat.