Durendal

Durendal is the Lee Family head's signature weapon, it has been passed down each generation until it found it's way into Curtis' hands.

Backstory
Durendal the immortal blade of a master hunter from Shion in epic literature. Not only is the blade completely indestructible, but it is said to be one of the sharpest objects in existence. After all; it is said to be created by the gods.

The sword was gifted to a master hunter of the town of Shion by the gods of Remnant for his loyal service, the master hunter, Robert Lee later attempted to destroy the sword in battle, to prevent it from being captured by attacking enemies. But Durendal proved indestructible.

After being mortally wounded, Robert hid it beneath his body as he lay dying along with the oliphant, the horn used to alert Shion before succumbing to his injury. The son of Robert then recovered the weapon, where it was kept within the family and passed down through generations until the blade was passed down to Curtis himself.