Dein Nomos

Dein Nomos is a sword in Tales of Vesperia.

Description
Dein Nomos has a red-ish purple blade with a hollow center. The blade has the ability to control aer as is seen in Keiv Moc.

In the Story
Dein Nomos was originally a sword owned by the Empire. The sword would be used in a ceremony when the next emperor was to take the throne. The reason why the Empire currently has no emperor was because Duke had taken it. While looking for Estelle, Duke handed the sword over to Yuri. Yuri used it until he defeated Alexei and returned it to Duke. Duke wields Dein Nomos in an almost telekinetic manner in the final battle.