Charm Guard

Choose a humanoid you can see within range. The target must succeed on a Wisdom saving throw or be charmed by you for the duration.

While charmed by you, the target attempts to end each of its turns within 5 feet of you. If you are attacked while the target is within 5 feet of you, the target uses its reaction to make itself the target of the attack instead of you. Each time the target takes damage, it can make another Wisdom saving throw, ending the spell on itself on a success. The spell ends if you directly harm the target.