Koll, the Forgemaster + Diamond Lion + Sai of the Shinobi + Tuktuk Rubblefort

Koll, the Forgemaster

Diamond Lion

Sai of the Shinobi

Tuktuk Rubblefort

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 clever loop turns Diamond Lion into a self-recycling mana engine by leveraging the passive support of your board. With Tuktuk Rubblefort granting haste so the Lion can tap immediately and Sai of the Shinobi automatically strapping itself to the Lion upon entry, the requirements for recasting are fully met. When you sacrifice the Diamond Lion for three mana, Koll, the Forgemaster sees the equipped creature die and dutifully returns it to your hand, leaving you up on mana to replay the Lion and repeat the process indefinitely.