Auril's Icy Weapon

Three willing creatures of your choice have their weapons coated in magical ice. They may use your Wisdom modifier for attack and damage rolls in place of their own attack modifier. These attacks deal cold damage instead of their normal damage types. This effect ends if the affected creature takes fire damage. Casting this spell at higher levels increases the potency of the enchanted weapons. At 5th level, the weapons gain a +1/+1 bonus. This bonus increases to +2/+2 when casting at 7th level and +3/+3 at 9th.