Izzet Spellementals' threats like Hearth Elemental (mana value 6 on the battlefield), Eddymurk Crab (mana value 7), and Sunderflock (mana value 9) are all far too big for Witherbloom Charm's destroy mode or Requiting Hex, so we trim the dead removal. Spell Snare picks off their mana-value-2 spells like Prismari Charm, Flow State, and Get Out, while Disdainful Stroke stops Sunderflock, Eddymurk Crab, Hearth Elemental, and Traumatic Critique cast with X of 2 or more before they resolve. Soul-Guide Lantern can exile their graveyard to shrink the instant/sorcery cost reductions on Hearth Elemental and Eddymurk Crab and to turn off Flow State's two-card mode. Duress and Winternight Stories are too slow against a deck trying to chain cheap spells into a quick kill.