Metastatic Evangel + Evolution Witness + Cryptic Trilobite

Metastatic Evangel

Evolution Witness

Cryptic Trilobite

How it works

1. Cast Cryptic Trilobite by paying 0.
2. Cryptic Trilobite 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 Cryptic Trilobite from your graveyard to your hand.
5. Repeat.

This clever loop relies on Cryptic Trilobite entering the battlefield with zero toughness when cast for free, immediately heading to the graveyard as a state-based action to generate a continuous stream of death and leaves-the-battlefield triggers. Metastatic Evangel sees this creature entry and triggers to proliferate, which neatly slides a +1/+1 counter onto Evolution Witness. That surge of counters triggers Evolution Witness to pluck Cryptic Trilobite right back out of your graveyard and into your hand, ready to be cast all over again.