These superb katanas, fashioned to look like the legendary Sunderblade, was [sic] used for centuries by high-ranking imperial Blades before the order was disbanded.
No one knows for sure who Captain Kordan was, but his unique weapon has been carried by many famous - and infamous - warriors since it surfaced during the Oblivion Crisis.
This legendary weapon belonged to the first leader of the Akaviri Dragonguards, who were sworn to the protection of Emperor Reman Cyrodiil, and who eventually became the order of the Blades.