Beifong's Bounty Hunters + Altar of Dementia + Dragonback Assault

Beifong's Bounty Hunters

Altar of Dementia

Dragonback Assault

How it works

1. Activate Altar of Dementia by sacrificing another nonland creature you control.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land.
3. Resolve the Altar of Dementia ability.
4. Activate Altar of Dementia by sacrificing the land.
5. When the land dies, Beifong's Bounty Hunters triggers, returning the land from your graveyard to the battlefield tapped.
6. When the land enters, Dragonback Assault triggers, creating a creature token.
7. Resolve the Altar of Dementia ability.
8. Repeat.