Beifong's Bounty Hunters + Gravecrawler + Goblin Bombardment + Stone-Seeder Hierophant

Beifong's Bounty Hunters

Gravecrawler

Goblin Bombardment

Stone-Seeder Hierophant

How it works

1. Activate Goblin Bombardment 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 Goblin Bombardment ability.
4. Activate Goblin Bombardment 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, Stone-Seeder Hierophant triggers, untapping it.
7. Holding priority, activate Stone-Seeder Hierophant by tapping it, untapping the land.
8. Resolve the Goblin Bombardment ability.
9. Activate the land by tapping it, adding at least .
10. Cast Gravecrawler from your graveyard by paying .
11. Repeat.