Vicious Shadows

The damage payoff that turns a board wipe into a kill, with a doubling-up of math that makes the conversion ugly. Each creature that dies fires its own trigger, and each trigger reads the hand of whatever player you point it at, so the natural construction is a deck full of cheap bodies and a sweeper to kill all of them on the same stack. Clear a six-creature board into an opponent holding five cards and that is thirty damage, but the spread is not free: every trigger recalculates against the targeted player's hand, so redirecting damage at a different opponent rescales to that opponent's grip rather than drawing from some shared pool. The count only ever cares about the target's hand, so it never touches your own unless you point it at yourself. That is why the most degenerate build wins, sacrifice fodder plus a mass kill, because the enchantment is indifferent to whose creatures were dying. The cost is the leash: seven mana for a permanent that does nothing on its own and demands a second piece (a wrath, a sacrifice engine, an edict chain) to come online, and on a stalled board where nothing dies it sits blank. What it punishes is precise, though. It taxes the full grip a control player hoards and taxes the wide board a go-wide deck wants to commit, folding two opposing tells into the same lethal arithmetic.