Spider-Man India + Crystalline Crawler + Ezzaroot Channeler + Whitemane Lion

Spider-Man India

Crystalline Crawler

Ezzaroot Channeler

Whitemane Lion

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 ingenious loop centers around Ezzaroot Channeler, whose static ability reduces the cost of creature spells by the amount of life you've gained this turn. By tapping Ezzaroot Channeler to gain 2 life, you discount your creature spells by {2}, making Whitemane Lion free to cast entirely with the mana provided by Crystalline Crawler. Every iteration triggers Spider-Man India, which continuously grows Crystalline Crawler to ensure you always have a counter to convert back into white mana. Finally, Whitemane Lion's own entry trigger bounces itself right back to your hand, ready to repeat the entire process indefinitely.