Ashiok, Nightmare Muse

A five-mana Ashiok that finally leans into the character's whole conceit: mind theft as a resource, not just as flavor. The prior Ashiok planeswalkers milled and exiled to build atmosphere; this one turns the stolen cards into ammunition. The +1 builds a board while grinding opponents' libraries into face-up exile, and the ultimate cashes those cards in, casting up to three of them for free. That loop is the design's spine: the plus feeds the emblem-tier payoff, so patience is literally accumulation. What makes the card play better than its loyalty math suggests is the −3, a planeswalker minus that bounces any nonland permanent and then forces the returning player to exile a card from their hand. That exile clause is the sly part, because a card exiled this way is another face-up card Ashiok's ultimate can steal: the removal ability quietly stocks the same larder the win condition draws from. Blue-black control had wanted a walker that defended itself while still advancing a win, and this one does both from a single card: it makes a blocker, it answers a threat, and it eventually plays the game with your opponent's spells. The Nightmare token deserves note, because its exile trigger fires on attack or block, so even a chump-block advances the theft engine. Every mode points the same direction: strip the opponent's options, then play with what you took.