Koll, the Forgemaster + Diamond Lion + Sai of the Shinobi + Anger

Koll, the Forgemaster

Diamond Lion

Sai of the Shinobi

Anger

How it works

1. Cast Diamond Lion by paying 2.
2. When Diamond Lion enters, Sai of the Shinobi triggers, attaching itself to Diamond Lion.
3. Activate Diamond Lion by tapping it, sacrificing it and discarding your hand, adding three mana of any color.
4. When Diamond Lion dies, Koll triggers, returning Diamond Lion from your graveyard to your hand.
5. Repeat.

This loop relies on Koll, the Forgemaster to continuously rescue Diamond Lion from the graveyard whenever it dies, provided the lion is carrying an equipment. Sai of the Shinobi solves this by automatically strapping itself to Diamond Lion the moment it enters the battlefield, ensuring it always meets Koll's requirement for a return to hand. Meanwhile, Anger sits comfortably in the graveyard granting haste, ensuring you can immediately replay the lion alongside the mana acceleration provided by Diamond Lion itself. By cycling Diamond Lion back and forth from your hand for just two mana, you net an extra mana on each iteration while generating infinite sacrifice, entry, and death triggers.