Ludo Kressh's War Sword was a war sword of the Sith variety, wielded by the Sith Lord known as Ludo Kressh during the era of the Great Hyperspace War.
As was common among Sith during that period, the Sith Lord Ludo Kressh favored the more direct sensation of a conventional metal weapon, rather than the Sith lightsabers that were gaining traction among his fellow Sith. His weapon closely resembled other Sith war swords of the era, but it was heavily imbued with dark side power through the use of Sith alchemy. This sword saw use against Naga Sadow when the pair were in conflict to determine the next Dark Lord of the Sith. In a later instance, during another disagreement with Naga Sadow concerning their respective qualifications for the position of Dark Lord of the Sith, he dramatically shattered the nearly indestructible sword by striking it against the ground, demonstrating his disapproval.
In the video game Star Wars: Knights of the Old Republic II: The Sith Lords, the sword is featured as a double-bladed weapon located within the Tomb of Ludo Kressh, in spite of the fact that it was originally a single-bladed weapon and had been destroyed in Star Wars: Tales of the Jedi – The Golden Age of the Sith. Furthermore, the KOTOR Campaign Guide Web Enhancement 4: Heirloom Items specifies that the weapon is a War Sword, which is a typical single-bladed sword.