In the epic of Beowulf, the hero faces the creature Grendel in the Land of the Danes. Grendel, a beast descended from the biblical figure Cain, terrorizes the hall of King Hrothgar, killing and devouring warriors. Beowulf's confrontation with Grendel showcases themes of heroism, bravery, and the struggle between good and evil. This battle sets the stage for Beowulf's eventual journey toward becoming a legendary hero.