Amulet of Force

This silver amulet is embossed with an arcane circle, set with a gem of amethyst at the center. While you wear it, once per day, you can cast the spell Magic Missile as a first-level spell without using a spell slot. In addition, any time you cast Magic Missile, including when cast using normal spell slots, you deal an additional 1d4 psychic damage per missile. 

Notes: Damage: Psychic, spellcaster