Kellan's Lightblades

Bargain turns one spell into two removal modes that split exactly where combat math wants them. Cast it plain and you have a three-damage combat trick locked to attackers and blockers: enough to kill most of what commits to a fight, cheap enough to leave up through either combat step. Pay the Bargain cost by throwing away a permanent you were never going to miss (a spent Food, a leftover Clue, a Servo idling in the back rank), and the three damage upgrades to unconditional destruction, which is the line that matters against fatties a burn number cannot reach. The trade is smart precisely because it eats overflow a token-rich or artifact-flush white deck already generates, converting spare board clutter into hard removal at instant speed without a mana tax on the turn you cast it. Two caveats hold it in check. Bargaining changes the effect, not the targeting, so the spell still reads "target": hexproof walls it and Ward taxes it regardless of mode. And the combat clause is a real leash. It only touches a creature that has committed to attacking or blocking, so a value engine that stays home is untouchable until it enters the red zone. That single restriction pins the card to being a two-mana trick rather than open-ended premium removal, while the Bargain mode pays off the exact deck manufacturing disposable permanents in the first place.