Yedora, Grave Gardener + Living Plane + Phyrexian Altar

Yedora, Grave Gardener

Living Plane

Phyrexian Altar

How it works

1. Activate Phyrexian Altar by sacrificing another nontoken creature you control, adding one mana of any color.
2. The creature dies, triggering Yedora, returning the creature from your graveyard to the battlefield face down as a Forest land and as a 1/1 creature due to Living Plane.
3. Repeat.

With Living Plane turning every land on the battlefield into a 1/1 creature alongside its normal land types, the stage is set for a magnificent botanical loop. When you sacrifice a creature to Phyrexian Altar to generate a colored mana of any type, Yedora, Grave Gardener immediately steps in to catch it as it dies, returning it straight to the battlefield face down. Because that returned permanent is both a Forest land and—thanks to the enchantment—a creature, it can be sacrificed right back to Phyrexian Altar to fuel the engine infinitely.