Spider-Man India + Crystalline Crawler + Kor Skyfisher + Heartless Summoning

Spider-Man India

Crystalline Crawler

Kor Skyfisher

Heartless Summoning

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 loop relies on Heartless Summoning to drastically discount your creatures, allowing you to cast Kor Skyfisher for just a single white mana. When the Skyfisher enters the battlefield, its own trigger forces you to return a permanent to your hand, which conveniently bounces the Skyfisher right back to where it started so you can keep the cycle going. Meanwhile, Spider-Man India acts as your payoff and bridge, triggering off every creature spell to empower Crystalline Crawler with fresh +1/+1 counters. Finally, you cash in those very same counters via Crystalline Crawler's active ability to generate the white mana needed to pay for Kor Skyfisher anew, looping the entire process indefinitely.