Sentry

+2: (Bonus Action) Target creature gains 10 temporary hit points that last until the end of your next turn.
-X: (Bonus Action) Target creature gains a bonus of +X to its AC, attack, and damage bonuses until the end of your next turn.
-10: (Action) Creatures of your choice gain resistance to all damage and advantage on all attacks for Y turns (Y=1/2 your level)