UW Control is loaded with countermagic (Dovin's Veto, No More Lies, Spell Snare, Censor) and removal (Supreme Verdict, Temporary Lockdown, March of Otherworldly Light), so Surrak, Elusive Hunter is excellent since it can't be countered and draws us a card whenever they target one of our creatures or creature spells with a counterspell or removal. Elesh Norn, Mother of Machines is a 4/7 body that also stops their enter-the-battlefield triggers, which shuts off Temporary Lockdown and Beza, the Bounding Spring, and it doubles the enter triggers on our own permanents like Invasion of Ixalan and Cavalier of Thorns. Kiora, Behemoth Beckoner survives Supreme Verdict, but it isn't a threat on its own in this matchup, so it's a fine cut to make room. Keep Invasion of Ixalan and Storm the Festival as our primary ways to go over the top of their removal- and counter-heavy plan.