Winter Bane

This weapon has all the properties of a Greatsword.
Ice Imbued. When you hit with an attack using this magic sword you gain a +2 bonus to attack and damage rolls made with it and can convert all the damage dealt into cold damage. In addition, any target hit by the sword takes an extra 1d6 cold damage. 
Frost Guard. As a reaction when you or a creature you can see takes fire damage, you can emit a sphere of cold energy in a 10 foot radius around the sword. All creatures within the sphere gain resistance to fire damage until the start of your next turn.
Cold Pulse. In freezing temperatures, the blade sheds bright light in a 10-foot radius and dim light for an additional 10 feet. When you draw this weapon, you can extinguish all nonmagical flames within 30 feet of you. This property can be used no more than once per hour.

Item type

Weapon, Melee