Metamorphosis Fanatic + Prowling Geistcatcher + Yahenni, Undying Partisan

Metamorphosis Fanatic

Prowling Geistcatcher

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Metamorphosis Fanatic.
2. When Metamorphosis Fanatic dies, Prowling Geistcatcher's first ability triggers, exiling Metamorphosis Fanatic from your graveyard.
3. Resolve the Yahenni ability.
4. Activate Yahenni by sacrificing Prowling Geistcatcher.
5. When Prowling Geistcatcher dies, its second ability triggers, returning Metamorphosis Fanatic from exile to the battlefield.
6. When Metamorphosis Fanatic enters the battlefield, it triggers, returning Prowling Geistcatcher from your graveyard to the battlefield.
7. Resolve the Yahenni ability.
8. Repeat.