This is a grindy matchup against a control deck built around Up the Beanstalk and Leyline Binding, so Consign to Memory is valuable both as a cheap counter for colorless spells and to shut off Clue draws or Beanstalk triggers at instant speed. Hydroblast is a one-mana answer that can counter or destroy a red permanent or spell, useful against any red cards like Pyroblast they bring in from their own sideboard. Prismatic Ending has fewer efficient early targets since their mainboard is light on cheap nonland permanents worth exiling, so it comes out in favor of more mana-efficient reactive interaction. Keep Force of Will and Force of Negation in to fight over Up the Beanstalk and Leyline Binding, since disrupting their card advantage engine is the key to winning this grind.