Yedora, Grave Gardener + Phyrexian Altar + Monastery Flock

Yedora, Grave Gardener

Phyrexian Altar

Monastery Flock

How it works

1. Activate Phyrexian Altar by sacrificing Monastery Flock, adding .
2. When Monastery Flock dies, Yedora triggers, returning Monastery Flock from your graveyard to the battlefield face down as a Forest land.
3. Activate Monastery Flock by tapping it, adding .
4. Activate Monastery Flock's morph ability by paying , turning it face up.
5. Repeat.

This clever engine turns your graveyard into a revolving door of mana, utilizing Yedora, Grave Gardener's static ability to constantly recycle your fallen creatures into lands. When you sacrifice Monastery Flock to Phyrexian Altar, Yedora steps in to return it to the battlefield face down as a Forest, which can then tap itself for green mana. To keep the loop going, you use the blue mana generated by the Altar to pay for Monastery Flock's morph cost, turning it face up so it's ready to be sacrificed all over again.