The prior quest ended in a cave in Bengaresh Desert. In this cave you will find Alibaba. It seems he and his gang of 40 thieves has occupied this Temple Guardian location.
Apparently, he is not in a mood to discuss the matter. Oh well... Guess you will just have to kill him and all his gang. You will find them scattered throughout the cave. After they are all dead, you can collect what you came for, Energy Source XS - Fourth Key.
Your next stop is in The Jungle.
Just south of the Archaeologist Camp you will find a small clearing. In that clearing, you will meet Android, who is the fifth, and final, key.
With Android in tow, continue south. Immediately after crossing Kybele's Tears, you meet Ambrox, Envoy of the Dragons.
Ambrox is suspicious and insists on accompanying you. Now take the five keys and your dragon chaperone, and head to the Temple of Tears.
Once there, you find Project Dragon Nemesis.
No wonder Ambrox was suspicious! Now with the serum destroyed, talk to him again.
Hirelings and Escorts