Agatha of the Vile Cauldron + Propagator Drone + Prismite

Agatha of the Vile Cauldron

Propagator Drone

Prismite

How it works

1. Activate Propagator Drone by paying , creating a 0/1 Eldrazi Spawn creature token.
2. Activate the Eldrazi Spawn by sacrificing it, adding C.
3. Activate Prismite by paying 1, adding .
4. Repeat.

This clever loop revolves around Propagator Drone's ability to manufacture Eldrazi Spawn, but the math only works because Agatha of the Vile Cauldron is on the battlefield to slash activation costs by her power. With Agatha's discount in play, Prismite steps in as the crucial currency converter, turning the colorless mana from the sacrificed Spawn back into the green mana required to keep Propagator Drone's engine humming indefinitely.