Eddie's Efficient Emplacement

For the duration of the spell and while concentrating the caster may swap out their own Armor Class with a creature within range, the creature's armor class becomes that of the caster and the caster's that of the creature. If the target is unwilling they must succeed on a Wisdom saving throw. On a success the spell fizzles and does nothing. On a failure the target is affected by this spell and can make another attempt at the Wisdom saving throw at the end of their turns.