Beifong's Bounty Hunters + Gravecrawler + Viscera Seer + Amulet of Vigor

Beifong's Bounty Hunters

Gravecrawler

Viscera Seer

Amulet of Vigor

How it works

1. Activate Viscera Seer by sacrificing Gravecrawler.
2. When Gravecrawler dies, Beifong's Bounty Hunters triggers, earthbending a land that can tap to produce at least .
3. Resolve the Viscera Seer ability.
4. Activate Viscera Seer 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, Amulet of Vigor triggers, untapping the land.
7. Resolve the Viscera Seer ability.
8. Activate the land by tapping it, adding at least .
9. Cast Gravecrawler from your graveyard by paying .
10. Repeat.