Consult the Necrosages

The Dimir guild charged most of its early cards with a sorcery-speed tax on flexibility, and few wear that bargain as plainly as this one: a single spell that either fills your hand or empties someone else's, but never both, and never at the moment you most want it. The modal split carries the whole design weight. Drawing two cards for three mana at sorcery speed is a fair rate that Dimir blue wanted; making the same card a Mind Rot when you need to attack the opponent's resources instead is the black half of the bargain. You buy the option to choose, and you pay for it by choosing late, after the turn cycle has already told you which mode you needed. The "target player" wording on both halves is a quiet wrinkle that rarely matters but occasionally does: you can point the discard at yourself to dump a graveyard payoff, or aim the draw at an opponent in a politics-heavy game. What grounds it is that neither mode is pushed. Two cards is the smallest interesting number for both drawing and discarding, the sorcery speed forecloses any instant-speed information advantage, and the cost asks for both blue and black rather than splashing easily. It is filtering and disruption folded into one card at a price that flatters neither, the kind of even-handed midrange tooling the guild was built around.