Event on Colossal Cavern

You men begin to grumble as they pass through the dank caves carved into cavern walls to serve as upscale tombs and mausoleums for those wealthy enough to escape the mass graves below. Some want to slow down and do some looting. Others urge you to press on. Up ahead the gloom is penetrated by a ray of light. Is it the exit from the catacombs or just the entrance to a deeper level of the dungeon?