Beifong's Bounty Hunters + Phyrexian Altar + Rat King, Pale Piper

Beifong's Bounty Hunters

Phyrexian Altar

Rat King, Pale Piper

How it works

1. Activate Phyrexian Altar by sacrificing another nonland creature.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land you control.
3. Activate Phyrexian Altar by sacrificing the earthbent land.
4. When the land dies, Rat King and Beifong's Bounty Hunters trigger.
5. Resolve the Beifong's Bounty Hunters trigger, returning the land from your graveyard to the battlefield.
6. Resolve the Rat King trigger, creating a creature token.
7. Repeat.