You cause the minds of up to three creatures you can see within range to share a nightmarish vision. Each target must make a Wisdom saving throw. On a failed save, a target takes 3d6 psychic damage and is haunted by the nightmare for the duration. On a successful save, a target takes half the damage and isn’t haunted.    Until the spell ends, a creature haunted by the nightmare takes 1d6 psychic damage at the start of each of its turns for each other creature haunted by this spell’s nightmare. A haunted creature can make another Wisdom saving throw at the end of each of its turns. On a success, the spell ends on the target.