Ebonblade Reaper

Half your life to swing, half theirs to connect: a damage formula that drags combat toward the kill instead of trading in the chip-damage increments most creatures deal in. Halving rounds up, so the attacker pays a steepening toll the lower its own life goes, while a connection caps an opponent no matter how high their total has climbed. The percentage scales against any starting point, which makes it indifferent to the long, padded life totals that shrug off an ordinary 1/1 beater. Two clean hits leave a player on roughly a quarter, then a sliver. Morph exists because a face-up 1/1 with a self-mutilating attack trigger would never survive to swing: deploying a generic face-down body, then turning it up during the declare-blockers step (after attackers are committed but before damage), is how you collect the "deals combat damage" trigger while sidestepping the "attacks" trigger entirely, dodging the life payment on the way in and revealing both the fragile creature and the intent only once blocks are locked. The self-inflicted half-life is the toll that stops the trigger from being a free clock; it bleeds the controller as hard as any misjudgment does. The card behaves less like a creature than a wager you place on a board you already expect to close.