Arc Spitter

For one mana to cast and one to attach, this hangs a repeatable pinger onto a creature, but the granted ability is fenced in by a single word: blocking. The damage can only ever hit a creature that has declared itself as a blocker of the equipped creature, which turns what looks like a generic pinger into a narrow combat-math instrument. It does nothing on defense, nothing against creatures sitting back, and nothing until an opponent commits to a block; the payoff arrives only in the attack step, only after the defender has already made their decision, and only against the specific bodies now tangled with yours. What it buys is a way to punish a block after it is declared: swing, wait for the block, then spend mana to kill the smaller blocker before combat damage resolves, so your attacker survives the exchange and the defender's creature does not. The attacker stays blocked and deals no player damage unless it has trample, so the win condition here is attrition, not breakthrough: you are trading up in combat and grinding down the walls that would otherwise stall you. It makes tokens and x/1 chumps miserable to block with, since every unfavorable block can be turned into a straight loss. The whole design is an exercise in how narrow a repeatable damage source has to be to earn a floor price: strip away the ability to shoot at will, chain the damage to combat, and the rate can bottom out.