Perigee Beckoner + Goblin Bombardment + Metamorphosis Fanatic

Perigee Beckoner

Goblin Bombardment

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 Goblin Bombardment by sacrificing Perigee Beckoner.
4. Activate Goblin Bombardment 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 Goblin Bombardment ability from step 4.
9. Repeat from step 3.

This elegant loop uses Perigee Beckoner's enter-the-battlefield trigger to grant a temporary undying-style effect to Metamorphosis Fanatic, ensuring neither creature stays in the graveyard for good. Once both are primed, Goblin Bombardment serves as the fatal outlet, letting you repeatedly sacrifice the pair for endless damage while triggering each other's return abilities indefinitely.