Complex sentence: Scatha was a mighty "long-worm" of the Grey Mountains, little is known of Scatha except that he was slain by Fram son of Frumgar (an ancestor of Eorl the Young) in the early days of the Éothéod.
Split into simpler sentences: Scatha was a mighty "long-worm" of the Grey Mountains. Little is known of Scatha except that he was slain by Fram son of Frumgar (an ancestor of Eorl the Young) in the early days of the Éothéod.