Metastatic Evangel + Evolution Witness + Marketback Walker

Metastatic Evangel

Evolution Witness

Marketback Walker

How it works

1. Cast Marketback Walker by paying 0.
2. Marketback Walker 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 Marketback Walker from your graveyard to your hand.
5. Repeat.

This clever loop relies on Marketback Walker entering with zero toughness when cast for free, immediately heading to the graveyard as a state-based action to trigger its own death count alongside endless creature leaves-the-battlefield and enters-the-battlefield events. As that walker hits the bin, Metastatic Evangel uses the resulting entry to trigger a proliferate wave, which cleverly drops a +1/+1 counter onto Evolution Witness. That counter placement sparks the witness's triggered ability, allowing you to scoop Marketback Walker right back out of your graveyard and into your hand to start the cycle anew.