Disciple of Perdition

A death trigger built around a life total nobody stumbles into. Both modes justify a two-drop's demise on their own: a compressed half of Sign in Blood attached to a death, or an opponent's graveyard exiled while that player bleeds a point. The wrinkle is the exactly-13 clause, which lets you fire both at once, and 13 is a figure that only exists in decks steering their own life total toward a target rather than clinging to a cushion. That is the black tradition this Warlock descends from: paying life for cards, aiming at a precise loss number, converting your own attrition into forward motion. The design asks you to pilot your life total the way a combo deck sequences its stack, landing on the magic figure the same turn the creature was already going to die. Miss by a point in either direction and you get an ordinary modal death trigger; hit it and one body draws a card, exiles a graveyard, and shaves points from both players together. The modest 1/3 frame does the quiet work here, cast to block and trade into its own death rather than attack, so the creature is really just the vehicle that carries you to the trigger. It rewards the pilot who treats reaching 13 as a line of play rather than a coincidence.