To get vartugg to come home from his business trip you need to place 4 relics the horn, the shield, the robe and the staff. So when you get through with the shadow ruins then you should be able to place the staff in the chamber of spirits and Vartugg will return.
Check the walkthrough to figure out what to do next in the shadow ruins at
http://www.gamebanshee.com/dungeonlo...sfinalarea.php
D