Void Weapon

You conjure a weapon of void energy that takes the form of any melee weapon. The weapon lasts until the spell ends. It counts as a simple melee weapon with which you are proficient. It deals 3d6 cold damage on a hit and has the finesse and light properties. The weapon can be attacked with as a bonus action or an action, and the cold damage dealt by this spell ignores resistance and immunity.

At Higher Levels. When you cast this spell using a 3rd- or 4th-level spell slot, the damage increases to 4d6. When you cast it using a 5th- or 6th-level spell slot, the damage increases to 5d6. When you cast it using a spell slot of 7th level or higher, the damage increases to 6d6.