Starbreaker

This glowing morningstar casts bright light in a 20-foot radius and dim light for an additional 20 feet while you hold it. You gain a +2 bonus to attack and damage rolls made with this magic weapon. Targets hit by the weapon take an extra 1d4 radiant damage. In addition, you can use an action to cast the daylight spell using the weapon. Once the weapon has been used to cast this spell, it can’t do so again until the following dawn.