Shadow, Mysterious Assassin

Deathtouch on a three-power body is the setup, not the payoff: it exists to make attacks and blocks dangerous. What the design actually wants is the combat-damage trigger, which turns every hit into a sacrifice engine that draws two and scales the drain to whatever you fed it. The elegance is in how it rewards throwing away the expensive thing. Most sacrifice outlets treat permanents as fungible fuel; this one prices the offering by mana value, so a token nets nothing on the life-loss axis but a six-mana permanent you were about to lose anyway becomes a six-point drain plus two cards. That inversion (dump your best board when it's about to die, not your worst) is the interesting decision. The self-sacrifice clause requiring another nonland permanent keeps it honest by refusing to let the creature eat itself for value, and the deathtouch means opponents think twice before blocking: a chump trade still costs them a creature, though a blocker does deny the trigger for that combat. It sits in a long line of black attack-trigger value creatures that reward getting through, but where most of those cards ask you to build for evasion, this one leans on the keyword to make combat threatening and asks you instead to build a board worth feeding it. The trigger's ceiling scales with your permanents' mana values, so the deckbuilding tension is real: you want expensive things to throw, but you also want them to have done a job first.