Rakdos Riteknife

Most equipment hands a creature a flat, static bonus; this one builds its payoff from a sacrifice loop wired into the wielder. Every creature you feed through the equipped creature's tap ability becomes a blood counter, and those counters do double duty: a running +1/+0 while the knife stays on the battlefield, then a one-for-one edict barrage when you crack it for the second ability. That dual accounting drives the decision every turn. You are choosing whether the counters keep growing a single threat or get cashed in to strip an opponent's board, and the two outcomes are mutually exclusive: sacrificing the equipment for the edict ends the buff entirely, since the knife leaves play with all its counters. It rewards a board already inclined to die in numbers (token makers, aristocrat shells, anything that treats creatures as ammunition), because the more bodies you route into the blade, the larger both the attacker and the eventual edict become. The catch is that the engine starts empty: with no creatures to feed it, the tap ability has nothing to eat and the counter count never moves, leaving an inert two-mana artifact granting +0/+0. This is a payoff dressed as a generic Equipment, a build-around that demands a sacrifice plan be in place first and pays out in proportion to how thoroughly you commit to one.