The Fellbeast is a monstrous, dragon-like creature ridden by the Nazgûl, or Ringwraiths, in J.R.R. Tolkien's 'The Lord of the Rings.' These terrifying winged beasts serve as mounts for the Witch-king and his fellow Ringwraiths, striking fear into the hearts of all who see them. With their enormous wingspans, sharp talons, and piercing screeches, the Fellbeasts play a pivotal role in the Nazgûl’s pursuit of the One Ring and their battles against the forces of good.