Helped needed to getAetherial Cobalt Katzbalger.

I've been looking trying to get this sword for the past two days. The only clue I've been going by was the fact that it may be in a chest in the leves of Coerthas (lvl 40). Never got it yet. I received every other Aetherial weapon EXCEPT that one. Sucks. Can anyone help me out???

Is there some reason why you need that item?

not really. I want it because it's a very powerful weapon. It's even more powerful than weapons ahead of it's required levels. I wouldn't need (or want) a new weapon until I reach level 44.