Abyssal Nocturnus

Discard decks have always struggled to convert an opponent's empty hand into a board they can win behind, and this Horror is an early attempt to fuse the two: each card the opponent pitches swells the 2/2 to a 4/4 and gives it fear, slipping past anything that isn't artifact or black. The clever part is that the trigger keys off an action the hand-attack archetype is already taking, so the deck pays nothing extra to fuel it. And because the ability reads "whenever an opponent discards a card," it counts each card individually: a two-card strip like Mind Rot fires it twice for a one-turn 6/6, and a wider strip stacks higher still. That generosity is also where the design quietly polices itself. The bonus is per-discard and expires at end of turn, so a big strip on turn three does nothing for the attack on turn five; without a fresh discard lined up, the body reverts to a plain 2/2 with no evasion. It rewards a steady drip of disruption over a single haymaker, which is a narrower demand than the upside suggests: the deck has to keep manufacturing discards turn after turn or the Horror sits there as a blank. Pairing an evasive clock with the same engine that strips the opponent's answers is a sound idea; sustaining the fuel long enough for a 2/2 to close is the catch.