Beifong's Bounty Hunters + Bloodghast + Yahenni, Undying Partisan

Beifong's Bounty Hunters

Bloodghast

Yahenni, Undying Partisan

How it works

1. Activate Yahenni by sacrificing Bloodghast
2. When Bloodghast dies, Beifong's Bounty Hunters triggers, earthbending a land you control.
3. Resolve the Yahenni ability.
4. Activate Yahenni by sacrificing the earthbent land.
5. When the land dies, it triggers, returning it from your graveyard to the battlefield tapped.
6. When the land enters, Bloodghast triggers, returning Bloodghast from your graveyard to the battlefield.
7. Resolve the Yahenni ability.
8. Repeat.