When he first appeared, this character was causing problems in Heorot, the hall of Hrothgar.
In the novel named for this character, he meets the Shaper, who tells him about Scyld Shefling, and he later argues with a dragon. In another work, this character loses his arm after attacking one of his enemy's companions. This character lends his name to a novel by John Gardner. His mother is a descendant of [*] Cain, and this character's mother cannot be killed by Unferth's sword Hrunting, leading his slayer to behead that mother using a weapon found in her underwater lair. When he first appeared, this character was causing problems in Heorot, the hall of Hrothgar. For 10 points, name this monster who was slain by the leader of the Geats, Beowulf.
In the novel named for this character, he meets the Shaper, who tells him about Scyld Shefling, and he later argues with a dragon.
Grendel