Name Thief

Your experience with the Fey has taught you that names hold power, and power can be stolen. You gain the following benefits.

Ability Score Increase. Increase your Charisma score by 1, to a maximum of 20.

Steal True Name. Whenever you force a creature to make a Charisma saving throw and it fails, you learn the creature's true name. If you know a creature's true name, it has disadvantage on all saving throws you force on it.