Wick's Patrol

Self-mill and the removal it powers ride the same trigger here, feeding each other in a single motion. The mill does two jobs at once: it stocks the graveyard whose greatest mana value scales the -X/-X, and any expensive card that lands in the bin from that same mill immediately raises the ceiling on the shrink. Because this arrives at six mana, the graveyard it reads is rarely thin by the time it resolves, and in a shell built to seed high-cost cards into the yard, X climbs high enough to erase most opposing bodies outright. Its scaling reads its power off the accumulated debris of the game rather than the target's stats or a fixed number, so it rewards a graveyard-oriented build without asking you to activate anything or hold up an answer at instant speed. The 5/3 body is a soft touch by comparison and dies to most things it trades with, but the value is front-loaded onto the enters trigger, so losing the creature after the mill resolves is a fair exchange rather than a loss. This belongs to a strain of black creatures that treat self-mill as an engine rather than a resource to be spent later, turning the act of digging into removal instead of just fuel for something else.