In the hands of any creature other than a mind flayer, a mind lash functions as a normal whip. In the hands of an illithid, this magic weapon strips away a creature's will to survive as it also strips away flesh, dealing an extra 2d4 psychic damage to any target it hits. Any creature that takes psychic damage from the mind lash must also succeed on a DC 15 Wisdom saving throw or have disadvantage on Intelligence, Wisdom, and Charisma saving throws for 1 minute. The creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
When making an attack with a finesse weapon, you use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.
This weapon adds 5 feet to your reach when you attack with it. This property also determines your reach for opportunity attacks with a reach weapon.