Corpse Blockade

A wall that bites, on a delay. The 1/4 defender body is built to clog ground: it bounces off anything bigger than a single point of power and cleanly eats the small fry, but on its own it is a speed bump, not a trade. The activated ability is what turns the posture from passive to lethal. Feed it a creature you no longer need (a chump that already did its work, a token, something marked for death) and the wall gains deathtouch, so the next attacker that runs into it dies regardless of size. The design sits at an intersection black rarely puts on one card: the defensive ground-clogger and the sacrifice outlet. Most sac outlets convert bodies into card advantage or reach; this one converts them into a single guaranteed kill in the block step. The honest constraint is the limit of one blocker per combat. Activating twice in a turn does nothing the first activation didn't already cover, so each combat phase the blockade can answer exactly one attacker, and only if you have fodder to spend. That makes it a policing tool against a deck's best single attacker rather than a board-wide deterrent, and a natural fit for a list already producing expendable creatures it can afford to feed under the wall one at a time.