Each battle has its own goal and struggles, each comes with its own sense of obligation, fame, and struggle. In the book Beowulf, there is a demon named Grendel who has been killing thirty men a night for twelve years and no one is ready to face him until now. Beowulf has the force of thirty men and volunteers to fight Grendel only to find that what seemed easy came with more struggle than expected. As the great King Shield died, Hrothgar succeeded Shield and ruled as king. Wanting to build a monument to his success, Hrothgar built a mead hall which he called Heorot. Grendel, a descendant of Cain, heard about Heorot and came to hear the spectacle. When he heard the songs sung about God, he became angry and killed thirty men every night for twelve years. Hrothgar's men, powerless against the beast, can do nothing to stop the monster. Beowulf hears about the demon and wants to fight it. He gathers men to help him fight the demon. When they arrive, they go to Heorot to prepare for that night's fight. Unferth challenges Beowulf with the swimming challenge against Brecca. Night arrives and Grendel arrives to kill his thirty men as he does every evening without knowing that he was going to be surprised. Beowulf wakes up and fights Grendel hand-to-hand, without sword or armor. They lock wrists and after a moment, Beowulf is able to rip Grendel's arm off, killing him. While he was fighting the demon, his men tried to kill the demon with their swords only to find that Grendel had put a spell on all the swords so they couldn't kill him. Beowulf and his men, thinking they had finished and helped Denmark regain its freedom, began preparing to leave. Only to discover that their journey has only just begun. Grendel's death made his mother angry so she decided to avenge his death. She goes to the mead and takes back Grendel's arm which was displayed as a trophy and she snatches a sleeping man. Hearing the noise, the others wake up and Grendel's mother flees, taking Aeschere and the arm with her to her lair. Beowulf not staying in Heorot was unable to fight Grendel's mother. Feeling obligated to fight her and goes to her lair. Swimming through the water which frightens the animals, he arrives at his lair. This time he fights Grendel's mother with an Unferth Hrunting and also wears armor..