Psychic Sting

You learn to sting things with your mind, granting you the following benefits:

• Increase your Intelligence score by 1 to a maximum of 20.
• You learn the magic missile. You can cast it without verbal or somatic components, and you can make the magic missiles invisible. If you already know this spell, its range increases by 30 feet when you cast it. 
• As a bonus action, you can try to psychically sting one creature you can see within 30 feet of you. When you do so, the target must succeed on a Dexterity saving throw (DC 8 + your proficiency bonus + Intelligence modifier).On a failed save, the creature takes 2d4 force damage. On a successful save, the creature takes half as much damage. You can use this reaction a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.