Morophon, the Boundless + Jodah, Archmage Eternal + Kor Skyfisher

Morophon, the Boundless

Jodah, Archmage Eternal

Kor Skyfisher

How it works

1. Cast Kor Skyfisher by paying 0.
2. When Kor Skyfisher enters, it triggers, returning itself from the battlefield to your hand.
3. Repeat.

By choosing a creature type like Human or Kor when Morophon, the Boundless enters the battlefield, you set up a magnificent engine where Jodah, Archmage Eternal's alternative fistful-of-colors cost meets Morophon's cost-reducing magic, making any spell of that chosen type completely free to cast. This means you can drop Kor Skyfisher for zero mana, letting its self-bounce drawback actually fuel the loop by returning itself straight back to your hand so you can cast it all over again.