Battle Scholar

You gain proficiency in Intelligence (History) ability checks.

During combat, you can use an action to study the landscape and enemy positions and remember battle tactics that you have once learned by rolling a History check (DC 12 + 1 for every enemy on sight). You must have clear visibility of the environment and your opponents to be able to perform the check. On a success, you add your proficiency bonus to any attack roll and ability checks against enemies you've studied during that fight.

The ability check can be repeated until every enemy has been affected by this feat. Each enemy can only be affected by this feat once.