For 10 points, name this monster who is killed in the first part of Beowulf.
The advisor Aeschere (ASH-er-uh) is killed in an act of retribution for the death of this character. His slayer is rewarded with a necklace by Queen Wealtheow (WEE-al-thow) and this character is apparently provoked by the sound of singing soldiers. He is killed by a warrior from Geatland (GAT-land) who fights unarmed and tears off his shoulder. He attacks the mead hall Heorot (HAIR-ut) of the Danish King Hrothgar (ROTH-har), and his death provokes the wrath of his mother, who lives at the bottom of a lake. For 10 points, name this monster who is killed in the first part of Beowulf.
The advisor Aeschere (ASH-er-uh) is killed in an act of retribution for the death of this character.
Grendel