Containment Priest is a cheap flash body that can ambush an attacker or arrive at end of turn to pressure their life total. It is only a 2/2, so it dies to Lightning Bolt. Witch Enchanter's destroy trigger only has Cori-Steel Cutter and Mishra's Bauble to hit in their list, which makes it the easiest cut for a card that contributes more. Chalice of the Void set to one is strong here, countering their mana value 1 spells such as Brainstorm, Ponder, Preordain, Lightning Bolt, and Dragon's Rage Channeler. It does not stop Daze (mana value 2) or Mishra's Bauble (mana value 0). It should stay in alongside Archon of Emeria's one-spell-per-turn restriction to blunt their cantrip-chain plan.