The Raishburzum (B.S. "Night-hunters"; S. Duferyth; or W. Nolly-nackers) were one of the lesser abominations bred by Morgoth in the beginning of the world. He originally created them to hunt the ancient Elves of Beleriand and the Nan Anduin. The return of the Noldor to Middle-earth and the first rising of the Sun spoiled this plan, The Nackers could not abide the light of day and grew to fear all the Firstborn. They retreated to dark holes and places far beneath the earth. Only the disappearance of the Elves from Siragale gave them the courage to return and test the beings of the surface world.