Orzhov Midrange is full of removal and card advantage (Caretaker's Talent, The Wandering Emperor, Skyclave Apparition), so Aven Interrupter lets us flash in to exile a key spell like The Wandering Emperor or Get Lost before it resolves, disrupting their tempo. Beza, the Bounding Spring's card draw and life gain triggers are strong in this grindy matchup where both decks fight over resources. Thalia doesn't meaningfully slow down a deck that's comfortable sequencing one spell per turn, and Enduring Innocence trades poorly into their efficient removal suite including Vanishing Verse and Fatal Push.