Quindosim chamber
From The Stargate Omnipedia
Quindosim chamber
A concealed, underground chamber on Sudaria which hid the Potentia for thousands of years. An inscription on the surface called the chamber "forbidden." One must use the nine stone tablets on a pedestal, applied in the correct order to generate the number fifteen in all directions. Only then, when your hands are placed on the pedestal, is the Potentia revealed. If not, the pedestal clamps down on your hands and poisons you.
KEY EPISODE
The Brotherhood - Allina and Sheppard's unit gain access to the Quindosim chamber where they begin to work on the puzzle that will grant them access to the Potentia.