Beowulf's Sword

Origin
Beowulf is the main character of the same named Old English epic. Written by an unknown author before the 1100s, it is set in ancient Scandinavia. Beowulf, warrior of the Geats, helps the Danish king Hrothgar defeat the monstrous Grendel attacking the Danes. After Grendel is slayed, Beowulf must face the wrath of Grendel’s mother and wins again, returning home with Hrothgar’s gifts. Fifty years pass where Beowulf is king of Geatland. His last challenge is to face a dragon; although he kills it, he is mortally wounded. In each battle, he insists on fighting in single combat. This is to protect his fellow warriors but mostly to add to his status of being a legendary warrior.

Effects
The sword will start to hum and vibrate when held by a compatible user. They must possess some justifiable pride and already have a notable reputation. Their strength will increase to inhuman rates and they can grow to a gigantic size when needed. Their fighting and leadership skills will also be greatly enhanced. However, it does create large monsters intent on destroying people. The user will win each fight, but each successive one will become more of a struggle and require help. By the third encounter, the user’s pride will be so inflated, they will make the fatal mistake of believing they can win by themselves, resulting in their death.