Distant Shield

You point at an ally under attack, instantly conjuring an invisible barrier of magical force to protect them. Until the start of their next turn, the target has a +3 bonus to AC, including against the triggering attack, and they take no damage from magic missile.

"I may be hiding behind you, but that doesn't mean you're in this alone!"

* - which you take when an ally within 30 feet is hit by an attack or targeted by the magic missile spell.