Simplify the following text for a Grade 4 native English-speaking person.
Original: Beowulf decides to follow the dragon into its lair , at EarnanÃ s , but only his young Swedish relative Wiglaf dares join him . Beowulf finally slays the dragon , but is mortally wounded .
Simplified: With the help of the young man Wiglaf , Beowulf kills the dragon .