Perigee Beckoner + Yahenni, Undying Partisan + Metamorphosis Fanatic

Perigee Beckoner

Yahenni, Undying Partisan

Metamorphosis Fanatic

How it works

1. Cast Perigee Beckoner for its warp cost by paying 1.
2. When Perigee Beckoner enters, it triggers, targeting Metamorphosis Fanatic.
3. Activate Yahenni by sacrificing Perigee Beckoner.
4. Activate Yahenni by sacrificing Metamorphosis Fanatic.
5. When Metamorphosis Fanatic dies, it triggers, returning itself from your graveyard to the battlefield tapped.
6. When Metamorphosis Fanatic enters, it triggers, returning Perigee Beckoner from your graveyard to the battlefield.
7. When Perigee Beckoner enters, it triggers, targeting Metamorphosis Fanatic.
8. Resolve the Yahenni ability from step 4.
9. Repeat from step 3.

This loop relies on a clever recursion chain between Metamorphosis Fanatic and Perigee Beckoner, where each creature constantly resurrects the other through a temporary death trigger and an entering-the-battlefield effect. While Yahenni, Undying Partisan acts as both the sacrificial outlet to kick off the cycle and a safe haven granting itself indestructible, the real engine is fueled by Perigee Beckoner granting its return-upon-death property to Metamorphosis Fanatic. As the two continuously trade places between the battlefield and the graveyard, you trigger an endless cycle of leaves-the-battlefield events, sacrifice triggers, and death triggers.