Okay, here are the results of using the Ebony Blade: The blades damage is at 29. I have never seen it raise more than that. I killed a few beggars, followers, and Housecarls, but the only time I heard the Whispering Lady say "Excellent work child" was when I went to Riverwood and I killed Faendal. So, the blade works and I probably earn some two-handed XP wielding it. Thanks to all who posted help.