It's a quest from Jazargund in Moria, 'Vanity' has you run to a mirror in the morroval caverns to the east, summon an elite and kill it. I did this around 10 times without the log updating itself, then I just gave up. Is this quest bugged? Or was there some strange thing I had to do?
"Live as if you were to die tomorrow. Learn as if you were to live forever." -Mohandas Gandhi
It's been a long time but I seem to remember this quest being buggy when Moria launched also. They have/are working on Moria so may have bugged it again if it was ever fixed. I had trouble getting her to spawn at the time.