Koll, the Forgemaster + Diamond Lion + Temur Ascendancy + Sai of the Shinobi

Koll, the Forgemaster

Diamond Lion

Temur Ascendancy

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 clever loop turns a modest artifact creature into a self-sustaining engine by cleverly manipulating its status as "equipped." When you cast Diamond Lion, Sai of the Shinobi's triggered ability steps in immediately to automatically strap itself on, ensuring the Lion is always considered equipped. Once you tap and sacrifice Diamond Lion to net three mana and dump your hand, Koll, the Forgemaster spots the death of your equipped creature and promptly returns it right back to your hand. Meanwhile, Temur Ascendancy rounds out the strategy by granting haste to everything and letting you draw cards whenever a creature with power 4 or greater enters, though the core mana-and-bounce loop itself runs purely on the synergy between the Lion, the Sai, and Koll.