
Prerequisite: Must have a dexterity score of 15 or higher Must be of level 4 or higher
You have learned to change your weapons and fighting style in a way that is fluid and requires little effort. You have also learned how to identify other fighting styles, and defend against them.
Gain the following benefits:
- Add 1 to your Dexterity with a maximum of 20
- Switching weapons does not cost an action and counts as a free action.
- you may use an action to use "Identify Fighting Style"
Identify Fighting Style: You may choose any creature within 50 feet of you that is armed to be affected. You can only affect one creature at a time. Affected creatures have disadvantage when attacking you while armed.

Little OP, don't you think? And did you mean that the identified creature would only have disadvantage on its melee attacks against you, or all against everyone? It's still too powerful either way without a resource limitation or a time limit, especially since you also increase an ability score by 1.