Use Jaron's Pick to find the four Highborne Relic Fragments. Bring them to Aurora Skycaller in Eastern Plaguelands.
The highborne spirits are miserable creatures, that's for sure. They are still searching for pieces of the very thing that has cursed them to Kel'Theril forever -- the stolen relic.
If you are that interested, take my pick and go south to the lake, see if you can gather the pieces of it from within the ice.
Now, I can't tell you a thing about what you find, but I do know of someone who might... Aurora Skycaller; she dwells near the Northpass Tower in the northern part of Eastern Plaguelands.