Tactician

Your study of war strategies and battle tactics has helped you to hone uncanny skills that you can call upon in the throes of combat. Time almost seems to slow as you process the battlefield around you, allowing for calculated strikes and swift maneuvers. Once per round, you can use the following effect:

• You choose a target and identify a weakness in your target's defenses. Using your bonus action, you can call out to a creature who can hear you to direct them towards that vulnerability, giving them either a +5 to an attack roll or a +10 to a damage roll against the same target. The creature must declare which bonus they are taking before making their attack roll.
• Additionally, you have advantage on all Intelligence (History) checks when recalling information on battle tactics and strategies.