Hateflayer

A pinger built to break combat math from the wrong end. Most repeatable damage creatures (the Prodigal Sorcerer line, the Cunning Bandits of the world) ping for a flat point and grind a board down slowly. Here the damage scales with power and lands as wither, so each activation deals 5 damage to a creature as -1/-1 counters and strips that much toughness for good. Because the damage equals its own power and wither does not reduce its 5 base when dealt to creatures, it stays at full strength while the opposing board shrinks past zero: a one-creature attrition engine that never grows but never shrinks either. The real constraint is the untap symbol in the activation cost. Firing the ability untaps the creature, which means it only works while tapped, so without help it goes off once a turn. Anything that taps it for value (a vehicle to crew, Springleaf Drum and the like) lets it untap and fire again, gating the rate by how many times you can tap it rather than by mana. Pay seven up front, then two and a red to flay something off the board at instant speed; the wither makes the removal stick even on creatures too big to kill outright, since five counters off a toughness are five counters that never come back. An expensive, slow answer that doubles as a slow win condition, and wither is the wrinkle that lifts it above every plain ping-for-power design before it.