Astrid's Psychic Lance

Utter a creature's name that is within range. If you don't know it's name, you need to see it. A shimmering lance of psychic power erupts from your forehead.   

Intelligence saving throw or take 7d6 psychic damage and become incapacitated until the start of your next turn. On a save, the creature takes only half damage and is not incapacitated.