Beifong's Bounty Hunters + Phyrexian Altar + The Necrobloom

Beifong's Bounty Hunters

Phyrexian Altar

The Necrobloom

How it works

1. Activate Phyrexian Altar by sacrificing another nonland creature you control.
2. When the creature dies, Beifong's Bounty Hunters triggers, earthbending a land.
3. Activate Phyrexian Altar by sacrificing the land.
4. When the land dies, Beifong's Bounty Hunters triggers, returning the land from your graveyard to the battlefield tapped.
5. When the land enters, The Necrobloom triggers, creating a creature token.
6. Repeat.