Guardian Training

when this feat is taken you gain access to an amount of d6 superiority die equal to your proficiency modifier, increasing to a d8 at level 5, d10 at level 9, d12 at level 13

When an ally is targeted with an attack roll within 30 ft. you may expend a Superiority die to move up to the rolled amount times 10 towards the ally. If you reach the targeted ally the attacking creature must make an attack on you instead.

Additionally if the attack hits you may take a reaction to only take half Damage.