Speak of the devil

Your Intelligence, Wisdom or Charisma score increases by one point. Upon gaining this feat you are able to tell when a creature within 30 ft of you speaks your true name whether you can hear them or not.

In combat when a creature speaks your name within 30 feet of you, you may use your reaction to vanish in a plume of smoke and instantly teleport to an unoccupied space within 5 feet of that creature.

Outside of combat when a creature speaks your name within 30 feet of you, you may instantly teleport to an unoccupied space within 5 feet of that creature.

You may use this feature a number of times equal to 1 + your chosen modifier (minimum of once) per long rest.