UB is another cantrip-and-counterspell tempo deck, leaning on Thoughtseize and Daze for disruption while Stormchaser's Talent and Flow State generate incremental advantage and protect their clock. Flusterstorm and Consign to Memory are your key tools to fight through Force of Will and Daze so you can land Show and Tell or Sneak Attack on your terms, with Consign to Memory also able to counter a Boomerang Basics aimed at your mana. Abrade is efficient removal for any early creature threat they stick. Omniscience, Spell Pierce, and Prismari Charm are cut because this matchup is decided by resolving your combo through their interaction, not by grinding out a long game.