Spider-Man India + Crystalline Crawler + Umori, the Collector + Kor Skyfisher

Spider-Man India

Crystalline Crawler

Umori, the Collector

Kor Skyfisher

How it works

1. Cast Kor Skyfisher by paying .
2. Spider-Man India triggers, putting a +1/+1 counter on Crystalline Crawler.
3. When Kor Skyfisher 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 turns the self-bouncing nature of Kor Skyfisher into an engine by using its entry to trigger Spider-Man India, which drops a +1/+1 counter right onto Crystalline Crawler. You can then immediately cash in that counter using Crystalline Crawler's ability to generate the white mana needed to cast Kor Skyfisher all over again. Meanwhile, Umori, the Collector sits quietly in the background, shaving generic mana off your creature spells to make the whole loop cost-neutral.