Protective Spirit Mask

Your mask carries the protective instincts of White Bull, the Horn Forger, and no one will hurt your allies while you have anything to say about it. Immediately after you Cast a non-cantrip Spell that targets only one ally, you can choose to have the spell also give that creature a +1 circumstance bonus to AC until the start of your next turn. Effect: Protective Spirit Mask

You also gain the Protector's Interdiction reaction.