Doppelganger

Hello. Before when i played Guild Wars (back at 2006) I remembered that I killed my doppelganger and I got loads of xp (Jumped from lvl 17 to 20) Now with my new character im going to do it again, but this time at level 15 (I will reach like lvl 18 or something) But I have forgotten so many things! I know how to kill him, but I don't remember where he is! So I would love to if someone could describe where to be runned/quests to do and so on. All I remember is that he's in the desert place. I searched for "doubleganger, and nothing turned up becuase i didn't spell it correctly) " with the search function but I only found posts about how to KILL him. Not where to find him. Thank you.
-Mz

And he/she is faced at the Augury Rock mission in Crystal Desert (Prophecies)

One more thing , you have to do all the missions in desert ( 3 of them ) before you can kill him/her. So you should be runned to Dunes of Despair, Thirsty River, Elona Reach missions, you have to do them and than you can face Doppelganger.

Btw, the quest reward may have been changed since you last played. At lvl15, you should get to lvl19 when you beat it(or lvl20 with some extra skill points if you get bonus as well).

Trolls deleted, question answered, thread