User blog comment:Jimeee/Skyrim 1.9 beta update adds Legendary difficulty and raises level cap (Updated Apr 8th)/@comment-208.108.127.227-20130312153701/@comment-71.29.169.211-20130312214054

But the Blades were replaced by the Penitus Oculotus. Plus the Blades are tied to the Dragonborn and those with the Dragon blood in them.