Beifong's Bounty Hunters + Bloodghast + Altar of Dementia

Beifong's Bounty Hunters

Bloodghast

Altar of Dementia

How it works

1. Activate Altar of Dementia by sacrificing Bloodghast
2. When Bloodghast dies, Beifong's Bounty Hunters triggers, earthbending a land you control.
3. Resolve the Altar of Dementia ability.
4. Activate Altar of Dementia 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 Altar of Dementia ability.
8. Repeat.