Metallic Rebuke is live and cheap against their key noncreature spells and creature spells like Solitude and Orcish Bowmasters, while Mystical Dispute is discounted whenever they cast a blue spell (Kaito, Bane of Nightmares, Teferi, Time Raveler). Strix Serenade counters a creature, artifact, or planeswalker spell outright, hitting Teferi, Narset, or any of their blink creatures, though it does give them a 2/2 flying Bird. Tormod's Crypt is largely dead here since they have minimal graveyard dependency (Ephemerate/Flickerwisp don't use the graveyard), so we cut it along with Claws of Gix for more interaction against their efficient value threats.