Whitemane Lion + Mana Echoes + Farrelite Priest

Whitemane Lion

Mana Echoes

Farrelite Priest

How it works

1. Cast Whitemane Lion by paying 1.
2. When Whitemane Lion enters the battlefield, it and Mana Echoes trigger.
3. Resolve the Mana Echoes trigger, adding C for each Cat you control.
4. Resolve the Whitemane Lion trigger, returning it to your hand from the battlefield.
5. Activate Farrelite Priest by paying 1, adding .
6. Repeat.
7. If you control at least two Cats outside of Whitemane Lion, this combo nets infinite mana.

This loop creates an infinite engine by leveraging Mana Echoes to turn the self-bouncing nature of Whitemane Lion into a net-positive mana generator, provided you control enough shared creature types to fuel the loop. As you repeatedly recast the Lion, Farrelite Priest steps in to help filter your mana and smooth out color requirements, allowing you to easily generate an arbitrary amount of both white and colorless mana. Because you're constantly casting and bouncing creatures, you also rack up an infinite storm count and endless enters-the-battlefield triggers to seal the game.