Beifong's Bounty Hunters + Phyrexian Altar + Skittering Precursor

Beifong's Bounty Hunters

Phyrexian Altar

Skittering Precursor

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, Skittering Precursor 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 Skittering Precursor trigger, creating a creature token.
7. Repeat.