Beifong's Bounty Hunters + Phantom Train + The Skullspore Nexus

Beifong's Bounty Hunters

Phantom Train

The Skullspore Nexus

How it works

1. Activate Phantom Train by sacrificing another nonland creature.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land you control.
3. Resolve the Phantom Train ability.
4. Activate Phantom Train by sacrificing the earthbent land.
5. When the land dies, The Skullspore Nexus 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 The Skullspore Nexus trigger, creating a creature token.
8. Resolve the Phantom Train ability.
9. Repeat.