Beifong's Bounty Hunters + Gravecrawler + Blasting Station + Tiller Engine

Beifong's Bounty Hunters

Gravecrawler

Blasting Station

Tiller Engine

How it works

1. Activate Blasting Station 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 Blasting Station ability.
4. Activate Blasting Station 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, Tiller Engine triggers, untapping the land.
7. Resolve the Blasting Station ability.
8. Activate the land by tapping it, adding at least .
9. Cast Gravecrawler from your graveyard by paying .
10. Repeat.