This is the mirror-ish matchup: Consign to Memory is premium here. It cheaply counters their colorless Lotus Petal, and it can also counter triggered abilities such as Atraxa's enter trigger or Emrakul's extra-turn cast trigger. Show and Tell is blue and Sneak Attack's ability is an activated ability, so Consign cannot answer either of those. Replicate lets you stop several Lotus Petals or triggers in one turn. Force of Negation gives a free way to stop their Show and Tell or Sneak Attack on their turn without spending mana. Keep 4 maindeck Force of Will as the primary interaction; this is a race to resolve your own threat first, so trim only the clunkiest non-essential spells like the tapped Hedge Maze and reactive bounce. Veil of Summer stays in because it makes your spells uncounterable for the turn, which blanks their Force of Will, Flusterstorm and Consign to Memory, and it draws you a card if they have cast a blue spell.