Metastatic Evangel + Evolution Witness + Omarthis, Ghostfire Initiate

Metastatic Evangel

Evolution Witness

Omarthis, Ghostfire Initiate

How it works

1. Cast Omarthis by paying 0.
2. Omarthis enters and dies as a state-based action due to having 0 toughness.
3. Metastatic Evangel triggers, causing you to proliferate and put a +1/+1 counter on Evolution Witness.
4. Evolution Witness triggers, returning Omarthis from your graveyard to your hand.
5. Repeat.

This clever loop turns the zero-mana casting of Omarthis, Ghostfire Initiate into a perpetual motion machine by exploiting state-based actions. As Omarthis enters the battlefield with zero toughness and immediately dies, Metastatic Evangel sees the entry and triggers to proliferate, placing a +1/+1 counter onto Evolution Witness. This triggers Evolution Witness's ability to return Omarthis from your graveyard right back to your hand, ready to be cast for free all over again.