At 15th level, your combat prowess and tactical direction can allow you and your allies to withstand devastating attacks. Provided you aren’t incapacitated, whenever you and one or more other creatures within 30 feet of you would be forced to make a saving throw against the same effect, each affected creature you choose gains a bonus to the saving throw equal to the number of chosen creatures (maximum bonus of +5).

You may use this feature a number of times equal to your proficiency bonus, regaining expended uses whenever you complete a long rest.