Orzhov Control is full of efficient removal (Fatal Push, Vanishing Verse, Get Lost) and value permanents like The Queen of Dale and The Ooze, so Aven Interrupter can exile their best spell (like Elspeth, Storm Slayer or The Wandering Emperor) at instant speed and leave a flying body behind. Clarion Conqueror shuts down The Ooze's graveyard-exiling ability and the loyalty abilities of their planeswalkers like The Wandering Emperor and Elspeth, Storm Slayer, and it is a flying body that Fatal Push can't easily answer without revolt. Archon of Emeria and Thalia, Guardian of Thraben are both exposed to their abundant cheap removal, so trim both for more resilient, impactful cards. Keep Skyclave Apparition in to answer The Wandering Emperor and The Queen of Dale.