Jaded Sell-Sword
A 4/3 body priced like a plain beater that quietly bills you for the payoff you already wanted. The Treasure clause is the whole design: cast it off ordinary lands and you get a passable four-drop that trades and blocks; route a Treasure through the payment and the same creature shows up with first strike and haste, swinging for four immediately and eating anything smaller that stands in front of it. The smart bit of common-tier engineering is that Treasure is fuel red decks are already generating for other reasons: ramp, artifact synergies, sacrifice fodder. The card asks nothing new of the deck, only that the mana you spend happen to pass through a token you were making anyway. That converts a mundane creature into a conditional premium on tempo, paid in a resource the deck treats as ambient. It rewards sequencing without demanding it, and it fails gracefully: whiff the Treasure and you still have a fine 4/3. Structurally it belongs to the family of enters-the-battlefield bonuses gated behind a payment condition, the same move spectacle and improvise make, here tied specifically to Treasure so that gold-token decks get a reason to hold their fabricated coin until the moment it buys a swing rather than a spell.

