Telepathy of the Illithids

The power of your telepathy has become comparable to that of a mind flayer — in more ways than one, granting you the following benefits:

• Increase your Intelligence, Wisdom, or Charisma score by 1, to a maximum of 20.
• You can speak telepathically to any creature you can see within 120 feet of you. Your telepathic utterances are in a language you know, and the creature understands you only if it knows that language. When you communicate telepathically with a creature, you can use your bonus action to give the creature the ability to respond to you telepathically until the start of your next turn.
• As an action you can emit psychic energy in a 30-foot cone. Each creature in that area must succeed on a Intelligence saving throw (DC equals 8 + your proficiency bonus + the ability modifier of the score increased by this feat) or take 2d8 psychic damage and be stunned for 1 minute. A creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. This feature’s damage increases by 1d8 when you reach 5th level (3d8), 11th level (4d8), and 17th level (5d8). Once you use this feature, you can't use it again until you finish a long rest.