Spider-Man India + Crystalline Crawler + Whitemane Lion + Honest Rutstein

Spider-Man India

Crystalline Crawler

Whitemane Lion

Honest Rutstein

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 loop relies on Honest Rutstein to reduce the cost of Whitemane Lion down to just {W}, allowing you to repeatedly cast and bounce the cat. As Whitemane Lion enters the battlefield, its own trigger forces it right back to your hand, while Spider-Man India capitalizes on each creature cast by stacking +1/+1 counters onto Crystalline Crawler. You then cash in those very same counters via Crystalline Crawler's activation to generate the exact white mana needed to start the cycle all over again.