Perigee Beckoner + Phyrexian Altar + Metamorphosis Fanatic

Perigee Beckoner

Phyrexian Altar

Metamorphosis Fanatic

How it works

1. Cast Perigee Beckoner for its warp cost by paying 1.
2. When Perigee Beckoner enters, it triggers, targeting Metamorphosis Fanatic.
3. Activate Phyrexian Altar by sacrificing Perigee Beckoner.
4. Activate Phyrexian Altar by sacrificing Metamorphosis Fanatic.
5. When Metamorphosis Fanatic dies, it triggers, returning itself from your graveyard to the battlefield tapped.
6. When Metamorphosis Fanatic enters, it triggers, returning Perigee Beckoner from your graveyard to the battlefield.
7. When Perigee Beckoner enters, it triggers, targeting Metamorphosis Fanatic.
8. Repeat from step 3.

This elegant loop centers on an infinite recursion between Metamorphosis Fanatic and Perigee Beckoner, each continuously rescuing the other from the graveyard. When Perigee Beckoner enters the battlefield, its triggered ability grants a temporary "undying"-style return clause to Metamorphosis Fanatic, while Metamorphosis Fanatic reciprocates upon entry by pulling Perigee Beckoner back out of the graveyard. Phyrexian Altar acts as the engine that oils this machinery, converting your loop into a steady stream of colored mana every time the creatures are sacrificed to its altar.