Auril's Frosty Axe

As a somatic component to cast this spell, you make a melee weapon attack with this magical weapon. You manifest the symbolic weapon of Auril, her axe. This axe functions as a +1/+1 Battleaxe with the following properties; you wield this weapon as though you were proficient, you may use your wisdom modifier for the attack and damage rolls of this weapon. It deals an additional 1d4 cold damage to targets struck. Any creature that would be resistant to cold damage loses that resistance when struck by this weapon until the start of its turn. This weapon deals an addition 1d4 for every level above 5th used to cast it. The bonus becomes +2 at 7th level and +3 at 9th.