Rakshasa's Secret

Mind Rot with a delve enabler stapled on. The two-card discard is the old, fixed-rate hand attack black has had since the earliest days; what the design grafts onto it is the self-mill clause, which turns a clean piece of disruption into a graveyard primer. The two cards you put in your own yard are not collateral damage but the point: they feed exile-cost mechanics, reanimation targets, and threshold-style counts, so a spell that reads as pure attrition doubles as setup. That dual purpose is also the tension the card lives with. The discard half attacks the opponent's hand; the mill half feeds your own library into your graveyard, so the two halves point in opposite directions, and only one of them touches the opponent. In a deck that wants a stocked yard, the mill is free value bolted onto a spell you were already casting. In a deck that does not, you have paid the same three mana as a vanilla discard-two and handed your library two cards' worth of nothing. The rate is identical to Mind Rot; the difference is purely whether the self-mill is an asset or dead text. That conditional upside is why it never displaced the plain version as the default hand-attack: it is a discard spell built for a graveyard deck, and outside that home the extra clause does nothing for you.