Horde Ambusher

A morph built to end a combat before blocks are ever declared. Cast for three, it holds the line as an anonymous 2/2 until the flip reveals a red card (color commitment, not mana, gates the turn-up) and strips a chosen creature of its ability to block that turn. Timing is where the play lives: a "can't block" effect has to resolve before blocks are declared, so you flip during the beginning-of-combat or declare-attackers window, on whichever creature the opponent was banking on to hold the line. Their blocking math was set for one more legal defender than they now have, and the attacker they meant to trade away connects clean. That turns every unflipped morph you control into a held threat: an opponent who knows this creature exists has to defend as if their wall might vanish a step early. The clause that pings you for a point whenever it blocks is the leash keeping it pointed forward; this is a creature built to attack, and the self-inflicted damage is the printed reminder that holding it back on defense is a cost rather than a plan. It belongs to the line of red morphs valued less for the information the face-down body hides than for the combat window the flip forces open, where what you reveal to pay the cost matters far less than the attack step it unlocks.