Song of Ir Yût
From Destinypedia, the Destiny wiki
Song of Ir Yût is a Legendary Machine Gun that deals Arc damage and is rewarded from Crota, Son of Oryx in the Crota's End Raid. It is reminiscent of Ir Yût, the Deathsinger - one of the raid's bosses - and her Deathsong.
List of appearances