Oketra's Monument + Tangleroot + Whitemane Lion + Mycosynth Lattice

Oketra's Monument

Tangleroot

Whitemane Lion

Mycosynth Lattice

How it works

1. Cast Whitemane Lion by paying 1.
2. Oketra's Monument and Tangleroot triggers.
3. Resolve the Oketra's Monument trigger, creating a 1/1 Warrior token.
4. Resolve the Tangleroot trigger, adding 1.
5. Whitemane Lion enters the battlefield, returning it to your hand.
6. Repeat.

This brilliant little engine transforms a humble cat into an endless army by turning its recurring entry into a self-sustaining mana and discount loop. When you cast Whitemane Lion, Oketra's Monument shaves the cost down so that the green mana generated by Tangleroot can pay for it entirely, even helping circumvent color restrictions thanks to Mycosynth Lattice making everything colorless and flexible. As the Lion bounces itself back to your hand with its own entry trigger, each iteration nets you a fresh Warrior token from the Monument, letting you churn out infinite creature tokens, enter-the-battlefield triggers, and storm count at will.