Psychic Corrosion

Mill decks have always faced the same structural problem: the clock is the strategy, so every card spent grinding an opponent's library is a card not spent surviving long enough to finish the grind. This enchantment answers that by attaching the mill to something a blue control shell already wants to do constantly. The trigger is on the draw, not on casting, which is the wrinkle that makes it more than a tax on tempo: any incidental card flow (a cantrip, a draw step, a card-advantage engine you ran anyway) becomes two cards off the top of each opponent's deck, free of opportunity cost. Stack two of them and a single draw mills four; pair it with a repeatable wheel or a draw-two effect and the increments stop feeling incremental. The design lineage here is the dream of mill that does not ask you to choose between defense and offense: the engines that protect you and the engine that wins are the same cards. It is a deceptively patient piece, doing nothing the turn it lands and everything across the turns after, and it rewires a control deck's value-drawing into a parallel win condition without changing how that deck wants to play.