Protector

When an enemy attacks an ally within 5' of you, you can take the hit upon yourself as a reaction. The attacking creature is drawn to you. For the duration, it has disadvantage on attack rolls against creatures other than you. It ends if you attack any other creature, if you cast a spell that targets a hostile creature other than the target, if a creature friendly to you damages the target or casts a harmful spell on it, or if you end your turn more than 30 feet away from the target.