Arterial Flow

Hand disruption that hits every opponent for two cards apiece and costs you nothing of your own is a rate designers rarely give away flat: strip a two-card advantage from each seat, price it at three mana, and you have something a black control deck would happily run without any theme attached. The tribal clause is the fence that keeps it from being that generically strong card. The base sorcery still hands you the discard against everyone, but the life swing (each opponent loses two, you gain two) only fires if you control a Vampire. That conditional does two jobs at once: it withholds the drain from any black deck that just wants the discard, and it ties the payoff to a board commitment, so the version that drains is the version where you have already spent mana on creatures. Because the discard half stays live regardless, the card never becomes a dead draw in the games where the Vampire never arrives; the floor is honest, the ceiling is earned. Mind Rot did the discard for the same converted cost a generation earlier with no upside attached; this is that effect rebuilt as a tribal reward, with the hand attack as the constant and the drain as the dividend that only the committed deck collects.