Spider-Man India + Crystalline Crawler + Kor Skyfisher + Grand Arbiter Augustin IV

Spider-Man India

Crystalline Crawler

Kor Skyfisher

Grand Arbiter Augustin IV

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 relies on Grand Arbiter Augustin IV reducing the cost of Kor Skyfisher down to a single white mana, allowing you to cast it repeatedly. As Kor Skyfisher enters the battlefield, its own ability forces you to return a permanent, but you can neatly target the Skyfisher itself so it's ready to recast. Meanwhile, casting the creature triggers Spider-Man India, which drops a +1/+1 counter onto Crystalline Crawler. You can then immediately cash in that very counter using Crystalline Crawler's activation to generate the exact {W} needed to keep the cycle spinning, churning through infinite creature enters-the-battlefield triggers, leaves-the-battlefield triggers, and storm count.