The Elephant in the Room

Eyes slide over you as foes size up you and your allies. You have a knack for subverting expectations and misleading assessments. You gain the following benefits:

• Increase your Charisma score by 1, to a maximum of 20.
• Any sentient creature within line of sight of you, whom you are aware of, who tries to make an initial Insight check about you as a tactical threat, does so with disadvantage.
• As an action you may choose a number of sentient creatures within your line of sight, not to exceed your Charisma modifier plus your proficiency bonus. You roll Deception, Persuasion, or Performance - opposed by their Insight - to mislead them. If you succeed, the creatures overlook you and must make a wisdom saving throw to target you in battle. Your saving throw DC uses your Charisma.
• If you attack any creature whom you have misled, that target has Surprise, and your attack rolls that turn have advantage against them as if they were blind.
• The charade ends should you attack a misled creature or if someone spends an action warning them of your dangerous nature. However, should you wish to play off your attack as a foolish blunder or mistake to the other misled creatures within line of sight, you may spend a bonus action to maintain the deception with another opposed roll, but they now roll with advantage.
• Foes you have attacked before gain advantage to their insight checks against you, and may warn their allies about you as a bonus action.