Krath war droid/Legends

The Krath War Droids were powerful battle droids created by the Krath, an organization of dark siders founded by the corrupt nobles of the Empress Teta System. The Krath War Droids were humanoid, but could hunch down as animals and race at amazing speed towards their target. They used pulse-wave bows which shot fire at their enemies and swords to hack them to pieces at close range. Many of the droids also carried pulse rifles, and were fitted with two short swords on each spindly arm. Though these droids were deadly opponents, they had limited intelligance and were programmed only to seek and destroy the greatest threat on the battlefield. These droids were easy to create and cheap to produce in large numbers. The War Droids were powered by Sith energy.

Thousands of these droids were deployed against the Jedi on the peaceful planet Deneba, during a meeting on the planet after the battle at Koros Major, where they slew many great Jedi. Thousands of Jedi Knights and Masters had gathered for the assembly under the direction of Master Odan-Urr. The Krath laid a trap, using sabotaged servant droids, which attacked the Jedi. This caused enough confusion to allow the War Droids to be deposited into the area by a Tetan corsair in orbit. The War Droids struck, first using their pulse-wave bows from long range and then charging at amazing speeds on to the battlefield. Eventually the Krath War Droids were defeated but many great Jedi were slain including Jedi Master Arca Jeth.