Lassaraukar (Q. "Demons of the Leaves"; "Leaf-demons"; sing. "Lassarauko"; S. "Lethryg" sing. "Lathrog"; W."Shards") were awful nocturnal creatures, Wood-spirits seduced and corrupted by Morgoth and refashioned into savage arboreal predators. Few monsters possessed their fetish for unrestrained terror. Immortal but unable to reproduce (or be bred), these heinous creatures possessed such refined hearing and smell that they could sense things with the precision of Elven sight. Nothing surpassed them in speed or agility, for they could run along the branches of trees and leap across gaps in the woods faster than a Swift could fly. A Lassarauko could start, change direction, and stop (but only at predetermined location) virtually instantly.