Beifong's Bounty Hunters + Dragonback Assault + Phantom Train

Beifong's Bounty Hunters

Dragonback Assault

Phantom Train

How it works

1. Activate Phantom Train by sacrificing another nonland creature you control.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land.
3. Resolve the Phantom Train ability.
4. Activate Phantom Train 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, Dragonback Assault triggers, creating a creature token.
7. Resolve the Phantom Train ability.
8. Repeat.

This ingenious loop centers around Phantom Train's activated ability, which lets you sacrifice creatures to grow it while temporarily turning it into an active creature. When you feed a creature to it, Beifong's Bounty Hunters springs into action, earthbending one of your lands based on the victim's power and turning it into a temporary creature you can immediately sacrifice to Phantom Train in turn. Because earthbent lands return to the battlefield tapped when they die or are exiled, each sacrifice safely cycles the land right back into play. That land's return then triggers Dragonback Assault's landfall ability to generate a 4/4 red Dragon creature token with flying, ensuring you always have a fresh sacrifice ready to feed back into Phantom Train and keep the engine roaring forever.