Beifong's Bounty Hunters + Umbral Collar Zealot + Bridge from Below

Beifong's Bounty Hunters

Umbral Collar Zealot

Bridge from Below

How it works

1. Activate Umbral Collar Zealot by sacrificing another nonland creature.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land you control.
3. Resolve the Umbral Collar Zealot ability.
4. Activate Umbral Collar Zealot by sacrificing the earthbent land.
5. When the land dies, Bridge from Below and Beifong's Bounty Hunters trigger.
6. Resolve the Beifong's Bounty Hunters trigger, returning the land from your graveyard to the battlefield.
7. Resolve the Bridge from Below trigger, creating a creature token.
8. Resolve the Umbral Collar Zealot ability.
9. Repeat.