Izzet Cauldron wins through Agatha's Soul Cauldron value engines and card draw off Vivi Ornitier and Proft's Eidetic Memory, so proactive disruption matters more than big bodies. Go Blank strips two cards and clears their graveyard, hurting Agatha's Soul Cauldron fuel and Arclight-style recursion plans while denying flashback/graveyard value. Necromentia can strip Agatha's Soul Cauldron or Vivi Ornitier from hand, graveyard, and library outright. Sheoldred, the Apocalypse and Graveyard Trespasser are less impactful here since the opponent has few relevant graveyard targets for Trespasser and Sheoldred can be bounced or ignored by a tempo-oriented deck; bring in cheaper interaction instead.