Koll, the Forgemaster + Diamond Lion + Urabrask the Hidden + Sai of the Shinobi

Koll, the Forgemaster

Diamond Lion

Urabrask the Hidden

Sai of the Shinobi

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 ingenious loop turns a modest artifact creature into a self-sustaining engine by exploiting Koll, the Forgemaster's ability to bounce nontoken creatures straight back to your hand whenever they die while equipped. Because Sai of the Shinobi automatically equips itself to Diamond Lion the moment it enters the battlefield, sacrificing Diamond Lion for a burst of three mana neatly satisfies Koll's death-trigger requirement. Thanks to Urabrask the Hidden granting your creatures haste, you can immediately recast Diamond Lion for two mana, letting Sai of the Shinobi snap back on and leaving you up one mana on every single iteration.