heaven
Grendel tormented Heorot for 12 years before Beowulf defeated him.
12 years
Grendel hates Herot because he feels rejected and isolated from the celebrations and joy happening there. The noise and revelry of the mead hall remind Grendel of his own loneliness and he sees the people in Herot as a threat to his existence. Grendel's violent and chaotic nature also fuels his hatred towards the hall and its inhabitants.
Herot is a mead hall in Beowulf, a famous Old English poem. In the story, Herot is attacked by the monster Grendel, who terrorizes the hall and its occupants for many years. Beowulf eventually arrives and defeats Grendel, bringing peace back to Herot.
Grendel hated Herot because it was a place of joy, celebration, and community, which contrasted with his feelings of isolation and rejection. The sounds of laughter and music coming from Herot angered him, as he felt excluded and tormented by the happiness inside the hall.
In "Beowulf," Herot was empty for 12 winters while Grendel terrorized the people before Beowulf arrived to defeat him.
In the epic poem Beowulf, the titular character is called upon to help the men of the Heorot mead hall, which is being terrorized by the monster Grendel. Grendel is a demon who eats men who is apparently motivated to attack because of hearing songs coming from the hall that detail God's creation of earth.
Grendel
Grendel's Claw (Arm) & Hroghgar's Closest Friend
Grendel's mother takes revenge for her son's death by killing one of Hrothgar's trusted advisors in Herot. She then takes Grendel's arm, which was hanging as a trophy in Herot, and retreats back to her underwater lair.
The warriors of Herot are celebrating and listening to the bard's song about the creation of the world. This angers Grendel and in his first attack he kills 30 sleeping men.
After the feast at Herot, Grendel attacks the warriors in the hall at night, killing many of them. This cycle of attack and retaliation continues until Beowulf arrives to defeat Grendel.