Armguard of Magic Missiles

This armguard has 4 charges. While holding it is equipped and attuned you can use an action to expend 1 or more of its charges to cast the magic missile spell from it. For 1 charge, you cast the 4th-level version of the spell. You can increase the spell slot level by one for each additional charge you expend.

The armguard regains 1d4 expended charges daily at dawn. If you expend the armguard's last charge, roll a d20. On a 1, the armguard crumbles into ashes and is destroyed.

Notes: Damage, Combat