Koll, the Forgemaster + Diamond Lion + Sai of the Shinobi + The Fire Crystal

Koll, the Forgemaster

Diamond Lion

Sai of the Shinobi

The Fire Crystal

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 elegant loop turns the self-sacrifice of Diamond Lion into a permanent engine for infinite mana and triggers, fueled entirely by the clever synergy of its support pieces. Because Diamond Lion enters the battlefield equipped thanks to Sai of the Shinobi's triggered ability, Koll, the Forgemaster recognizes the creature as equipped when it dies, instantly bouncing it back to your hand for re-casting. Meanwhile, The Fire Crystal quietly ensures your engine runs smoothly by granting your creatures haste—though its red cost reduction isn't strictly necessary here, the loop itself generates boundless colored mana, death triggers, and storm count directly from the Lion's activated sacrifice ability.