Ackren's Misty Mirror

A barrier of arcane misty appears and protects a creature of your choice within range (you can choose yourself). Until the spell ends, the target gains a +2 bonus to AC and takes no damage from magic missile.

Additionally the barrier acts as reflective mirror to the arcane, whenever the creature is targeted by a line spell or a spell that requires a ranged attack roll, roll a d6. On a 1 to 2, the target gains resistance to this instance of the spells damage . On a 3 to 5, the target is unaffected by the spells effect. On a 6, the target is unaffected, and the effect is reflected back at the caster as though it originated from the target, turning the caster into the target. The reflected spell uses the casters DC and spell attack roll modifier.