Agatha of the Vile Cauldron + Propagator Drone + Signpost Scarecrow

Agatha of the Vile Cauldron

Propagator Drone

Signpost Scarecrow

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 Signpost Scarecrow by paying 1, adding .
4. Repeat.

This charming little loop relies on Agatha of the Vile Cauldron to act as your ultimate cost-reduction engine, lowering the activation prices of your creatures based on her power. With those costs sufficiently discounted, Propagator Drone's ability to churn out Eldrazi Spawn tokens becomes shockingly cheap to run. You then feed those very same tokens into Signpost Scarecrow, which turns your colorless mana into the exact green mana needed to keep the cycle spinning.