Koll, the Forgemaster + Diamond Lion + Ronin Warclub + Dynaheir, Invoker Adept

Koll, the Forgemaster

Diamond Lion

Ronin Warclub

Dynaheir, Invoker Adept

How it works

1. Cast Diamond Lion by paying 2.
2. When Diamond Lion enters, Ronin Warclub 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 transforms a modest artifact cat into a self-sustaining mana engine by turning its death into its own ticket back to your hand. When you drop Diamond Lion, Ronin Warclub automatically swoops in to equip it, satisfying Koll, the Forgemaster's requirement that the dying creature be equipped to trigger its return to your hand. This lets you endlessly sacrifice the Lion for three mana of any color to recast it, while Dynaheir, Invoker Adept stands ready to grant haste and potentially copy your other activated abilities if you're channeling that mana back into them.