The Hidden Shrine (Hackmaster)

The Slaz'Steceks were once a highly advanced reptilian race. They created glorious cities that none could match and were said to have had the power to control time and travel the dimensional planes. They created a hidden shrine that was the focus of their power and pride of their race. Nevertheless, almost overnight their entire civilization crumbled and today they are nothing more than a race of savage tribal warriors. What caused this catastrophe? Could an ancient SlazStecek shrine hold some clue to what happened? Or should such a secret lie buried forever? Only you can decide. For characters of 4th to 6th level.