Doomsday needs to draw its way to lethal with Thassa's Oracle off a piled library, and Hullbreacher completely shuts off their extra draws from Brainstorm and Ponder, converting them to Treasures and buying us turns to assemble our own game plan. Bringing in the extra Force of Negation gives us maximum density of free interaction on their turn, ensuring we can counter key noncreature spells like Dark Ritual and Doomsday itself. We shave Waterlogged Teachings and Expedition Map since this matchup is about disruption and speed rather than mana fixing. Keep Force of Will up to protect against their own countermagic, and use Force of Negation on their turn to stop Doomsday.