Wand of Magic Missiles

This wand has 7 charges. While holding it, you can use an action to spend 1 or more of it's charges to cast the Magic Missile spell from it. For 1 charge, you cast the 1st-level version of the spell. You can increase the spell level by one for each additional charge spent.
The wand regains 1d6+1 charges at dawn. If you expend the last charge roll a d20. On a 1 the wand is destroyed.