You have a +2 bonus to attack and damage rolls made with this magic weapon.  This weapon also deals 1D6 cold damage when hit.    • 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

Proficiency with a Longsword allows you to add your proficiency bonus to the attack roll for any attack you make with it.

Notes: Bonus: Magic, Damage: Cold, must have proficiency, Damage, Combat, Versatile, Sap