50 years later, a slave sneaks into the wyrm’s cave and steals a bejeweled cup, angering the dragon and prompting it to attack the Geats’ lands. In response, Beowulf organizes a party to kill ...

Well, years later when Beowulf himself was king, a huge dragon was guarding treasure. A thief trying to steal a jewelled cup disturbed the dragon, who immediately flew into a furious rage.