Beifong's Bounty Hunters + Umbral Collar Zealot + Dragonback Assault

Beifong's Bounty Hunters

Umbral Collar Zealot

Dragonback Assault

How it works

1. Activate Umbral Collar Zealot by sacrificing another nonland creature you control.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land.
3. Resolve the Umbral Collar Zealot ability.
4. Activate Umbral Collar Zealot 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 Umbral Collar Zealot ability.
8. Repeat.