How did Grendel's mother attempt to seek revenge for the loss of her son?
As Beowulf opens, the Danish king Hrothgar and his men had languished under fear of the demon Grendel for twelve years. Beowulf, a Geat, liberates the Danes from the monster's haunting by slaying him. Beowulf kills Grendel by ripping his arm out of its socket; he decides to keep as a trophy, and the Danes hang it in their mead-hall. Before Grendel died, he fled back to his lair. This did not trouble the Danes, because they knew he had been mortally wounded. They begin to celebrate
Unfortunately, the Danes did not realize Grendel had a relative. When Grendel's mother realized what had happened to her son, she determined to seek vengeance. She descends upon the Danish mead-hall, Heorot, in the middle of the night. She takes Grendel's arm, abducts one of the king's advisors, and then flees to her lair. Beowulf ultimately decides to infiltrate her lair and kill her as well.