Spider-Man India + Crystalline Crawler + Urza's Incubator + Whitemane Lion

Spider-Man India

Crystalline Crawler

Urza's Incubator

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 clever loop revolves around casting Whitemane Lion for a single white mana, heavily discounted by Urza's Incubator naming Cat or Soldier to make the flash feline free. As Whitemane Lion hits the battlefield, its own entry trigger forces you to bounce it right back to your hand, creating an endless cycle of leaves-the-battlefield and enters-the-battlefield events. Meanwhile, Spider-Man India triggers off casting that creature spell to distribute +1/+1 counters onto Crystalline Crawler, whose converge and counter-manipulation abilities let you safely strip away those counters for mana—specifically the white mana needed to recast the Lion and keep the engine humming indefinitely.