Jaheira, Friend of the Forest + Ant Queen + Adrix and Nev, Twincasters + Kratos, God of War

Jaheira, Friend of the Forest

Ant Queen

Adrix and Nev, Twincasters

Kratos, God of War

How it works

1. Activate Ant Queen by paying 1, creating two 1/1 Insect creature tokens.
2. Activate the Insects by tapping them, adding .
3. Repeat

This loop relies on Jaheira, Friend of the Forest to turn your creature tokens into mana sources that tap for green mana. When you activate Ant Queen, Adrix and Nev, Twincasters steps in to double the resulting insect tokens, yielding more mana when tapped than the Queen's activation cost requires. While Kratos, God of War and its haste and double strike stats aren't strictly necessary to fuel the engine, the extra green mana generated at each iteration lets you repeat the process indefinitely for an arbitrarily large army.