+1 Longsword of Haunting

Weapon Rare (this item requires attunement)

You have a +1 bonus to attack and damage rolls made with this magic longsword.   This sword is covered with many clever holes, allowing it to play a haunting melody when swung through the air in a particular manner. When you make an attack roll against an enemy with this sword each creature (including you and your allies) must make a DC 15 wisdom saving throw, or be frightened of the sword. An effected creature can repeat the saving throw at the end of each of its turns. A creature that passes the save is immune to the effect for 24 hours.