UW Control has very few creatures, so Fiery Impulse, Volcanic Spite, and Fires of Victory have few targets against a deck full of counterspells, planeswalkers, and board wipes like Supreme Verdict. Spell Snare lines up well against their two-mana spells such as No More Lies, Censor, Get Lost, and Get Out. It cannot hit their own Spell Snare, which costs {U} and has mana value 1. It only hits March of Otherworldly Light when X is 1, and Dovin's Veto can't be countered at all. Change the Equation's first mode counters any spell with mana value 2 or less, including their one-mana Spell Snare, so it covers some of what Spell Snare can't. Its red-or-green mode has no targets against their white and blue cards. Hullbreaker Horror can't be countered, and once it resolves, each spell you cast can bounce a spell or a nonland permanent such as Teferi, Hero of Dominaria or Beza, the Bounding Spring. That makes it a strong top-end threat against their counter-heavy plan. Keep Indomitable Creativity in, but remember it is a sorcery and can be countered. They have few artifacts or creatures to target, so it mostly works by destroying your own artifacts or creatures to find a bigger one in your library.