Mind Shatter

You tap into the depths of psychic energy from
your connection and unleash a devastating
mental assault on a target within range. The target
must make an Intelligence saving throw. they take
6d6 psychic damage, and on a successful save, they
take half damage.
if the target fails the saving throw, they are afflicted with psychic turmoil. Until the end of their next turn, they have disadvantage on all ability checks and saving throws.