A Wormsinger Rune is a consumable found by killing Hive on the Dreadnaught during patrols or strikes. It can be used to activate a terminal located in a room beneath the Patrol spawn point. Once activated, a group of Acolyte and Knight majors will appear. Once they have been defeated, Blahgrish will be summoned. He will drop a Wormfeeder Rune once defeated.