Witch Blade

You form a small, needle-like blade of shimmering psychic force. It counts as a simple melee weapon with which you are proficient. This blade deals 1d4 piercing damage on a hit and has the light, finesse, ranged and thrown properties (range 20/60). 

When you hit with this weapon, the target’s ears are filled with a piercing din only they can hear. At the end of their next turn, if they are concentrating on a spell, they must make an Intelligence saving throw. On a failure, they take 1d8 psychic damage. The sound then fades.

After casting this spell again, or throwing, dropping or, as a bonus action, dismissing the weapon, it shatters harmlessly and vanishes, ending the spell.

The spell's additional damage increases by 1d8 when you reach 5th level (2d8), 11th level (3d8), and 17th level (4d8).