Beifong's Bounty Hunters + Phyrexian Altar + Zendikar's Roil

Beifong's Bounty Hunters

Phyrexian Altar

Zendikar's Roil

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, Zendikar's Roil triggers, creating a creature token.
6. Repeat.

This elegant loop turns the cycle of life and death into a perpetual mana engine by leveraging Beifong's Bounty Hunters alongside Phyrexian Altar. Whenever you sacrifice a creature to the Altar, the Bounty Hunters animate a land through earthbending, which you then sacrifice in turn for mana; crucially, that land's unique replacement clause returns it safely to the battlefield instead of staying in the graveyard. This recurring land drop immediately triggers Zendikar's Roil to spawn a fresh 2/2 green Elemental creature token, instantly replacing the sacrifice fodder you need to feed Phyrexian Altar all over again.