Izzet Spellementals is entirely blue-red, making Flashfreeze an efficient answer that counters Hearth Elemental or key red spells like Prismari Charm at two mana. Day of Judgment cleanly answers Hearth Elemental and Eddymurk Crab, destroying their threats regardless of size. Spell Pierce punishes their low curve and cheap spell-chaining plan by taxing them out of tempo. Cut slower card draw like Stock Up for more proactive disruption, since this is a race where every turn of delay matters.

UR Aggro plays several expensive threats like Roaming Throne and Sunderflock that Disdainful Stroke can catch, while Spell Pierce punishes their low curve of cantrips and noncreature spells on the turns they can't easily pay the tax. Sear kills most of their creatures outright, including Flamebraider and Ashling before it transforms. Cut Stock Up and It'll Quench Ya! since this is a race against an aggressive low-curve deck where slow, high-cost cards like Stock Up cost you tempo you can't spare, and you need cheap efficient answers instead.

Dimir Midrange is stacked with high-value planeswalkers and noncreature spells like Kaito, Bane of Nightmares and Requiting Hex that reward proactive countermagic; Negate stops Requiting Hex, We Say Thee Nay!, or Nowhere to Run cold, while Disdainful Stroke handles four-drops like Enduring Curiosity. Spell Pierce is a cheap tax that punishes their tap-out turns for Nowhere to Run. Trim Broadside Barrage since their creatures are mostly small utility bodies rather than big threats worth a 5-damage removal spell, and cut some cheap Lesson filler for more targeted interaction.