WU leans on Force of Will, Daze, and Consign to Memory to protect Tamiyo, Inquisitive Student and Quantum Riddler, so extra Force of Negation copies let us fight through their counterspell-heavy plan for free on their turn to land The One Ring or Ugin. Hullbreacher punishes their card-draw engines like Quantum Riddler and Tamiyo's investigate/draw triggers by converting their extra draws into our Treasures. Sink into Stupor is weak against a deck without many cheap creatures worth bouncing, and Thundertrap Trainer's card selection is replaceable with harder disruption against their countermagic-heavy shell.