Fabrication Module + Herd Baloth + Decoction Module

Fabrication Module

Herd Baloth

Decoction Module

How it works

1. Cast Herd Baloth by paying its mana cost.
2. When Herd Baloth enters, Decoction Module triggers, causing you to get E.
3. Fabrication Module triggers, putting a +1/+1 counter on Herd Baloth
4. Herd Baloth triggers, creating a creature token.
5. When the creature token enters, Decoction Module triggers, causing you to get E.
6. Repeat from step 3.