Spikeshot Goblin

A pinger that scales. Most repeatable damage engines of its era dealt a fixed amount: Prodigal Sorcerer tapped for one, and the rest of the Tim lineage rarely deviated. The departure here is that the damage tracks power, so the activated ability grows with whatever sits on the body. Tap it as printed and it fires for a single point, which is nothing; bolt a Bonesplitter or a Loxodon Warhammer onto a 1/2 Goblin Shaman and the same ability becomes a sniper rifle that picks off creatures and players for as much as the power total allows, every turn, at instant speed. That dependence on equipment is the lever the whole design turns on. The fragile body is the cost: a 1/2 dies to most of the removal it would otherwise mock, so the payoff comes only after you have committed cards to it. The open-ended ceiling separates it from a colored Tim. The you spend to fire never changes, but the damage it buys keeps climbing with every anthem and weapon you stack on top. A fixed activation cost against an unbounded payoff is what gives the card its teeth, modest at common rarity until it is suited up, at which point it becomes the threat every opponent has to deal with before it deals with them.