Captain Lannery Storm

Treasure arrived as a flavor hook for pirates and greed, but this captain wires it into a combat loop most Treasure payoffs never bother with. The attack trigger mints a Treasure; spending that Treasure pumps the body. The intended line is a closed circuit: swing, make the artifact, crack it for mana, grow the captain before damage resolves. Because the sacrifice can happen at instant speed in the combat step, the +1/+0 lands while blocks are still on the table, turning a 2/2 into a moving target during the declare-blockers window rather than a flat clock. The catch is the asymmetry built into the design: she rewards you for sacrificing Treasure specifically, not artifacts in general, and she only mints one per attack. On her own, the combat-step pump grows only as fast as she can bank Treasures from earlier attacks unless the deck is feeding her extra Treasures from other sources. That constraint is the whole identity. Solo, she is a haste body that pays for a chunk of herself in ramp; surrounded by Treasure producers, the pump scales with every Treasure you can spare to sacrifice, and the mana she throws off becomes fuel rather than a tax. The narrow trigger is what keeps her from being a free engine: only Treasures count, so the deck has to commit to generating them. She is less a finished machine than a hinge, a cheap aggressive creature that asks whether the deck around her treats Treasure as ramp or as ammunition.