Spider-Man India + Crystalline Crawler + Whitemane Lion + Grand Arbiter Augustin IV

Spider-Man India

Crystalline Crawler

Whitemane Lion

Grand Arbiter Augustin IV

How it works

1. Cast Whitemane Lion by paying .
2. Spider-Man India triggers, putting a +1/+1 counter on Crystalline Crawler.
3. When Whitemane Lion enters, it triggers, returning itself from the battlefield to your hand.
4. Activate Crystalline Crawler by removing a +1/+1 counter from it, adding .
5. Repeat.

This elegant loop uses Grand Arbiter Augustin IV to reduce Whitemane Lion's cost to a single white mana, allowing you to cast it repeatedly. As Whitemane Lion enters, its own trigger bounces it right back to your hand, while Spider-Man India capitalizes on each cast by dropping a +1/+1 counter onto Crystalline Crawler. That counter can immediately be cashed in for the exact white mana needed to fuel the next iteration, thanks to Crystalline Crawler's mana-producing ability.