Gonti, Lord of Luxury

Black has always paid for theft with friction: a discard, a sacrifice, a life payment somewhere down the line. This Aetherborn rogue rewrote that bargain by stealing from the one resource opponents can least defend, their library, and converting the spoils into a deathtouch body that already earned its mana before the ability resolves. The exile-and-cast clause is the clever part: you look at four cards, take one face down, and leave the opponent without information about what left. You still pay the card's mana cost to cast it, but you may pay with mana of any type, which quietly erases the color barrier that usually walls black off from blue counterspells or green ramp. That last detail is what makes the card a genuine fixing engine rather than a cute steal effect, because you are not only borrowing a spell but borrowing it on your own mana terms. The randomization of the remaining three back to the bottom is the cost that keeps the rummage honest: you do not get to sculpt the opponent's draws, only to lift one card and scramble the rest. The body is incidental; the deathtouch is there so a 2/3 can trade up and stay relevant after the steal has resolved. It is one of the rare creatures whose value scales directly with how good your opponents' decks are: the better their library, the better your free look pays out.