Placing the first orb causes a soft humming through the room, and placing the second causes the hum to grow louder. After a few moments, the two orbs flare brightly, then fade, still glowing, though the humming stops, and the wall that dominates the majority of the room... begins to move. Sections of it begin to move and tremble, and the whole cavern begins to shake. Just when it seems like everything's going to come apart, it stops, and a large section of it, about level with the ground, suddenly opens... and reveals a single, massive, golden eye, with a slitted pupil like a cat's, focused directly on him.