Now that they had the general idea of the Tomb, the group began to discuss their options. First, they started by going over what they knew:
They were seeking an object(?) known as the Soulmonger - a thing of great power that was sucking the life out of anyone who had ever been returned from the dead. It quite possibly was also empowering undead, and may eventually turn its power against the living. They had no idea where it might be (or even, if they were honest with themselves, that it was really here, though all signs pointed to it.
The tomb was built by Acererak, a powerful immortal (undead?) wizard who enslaved the population of Omu, killed their "gods" (animal totem spirits) and entombed them here.
The Tomb of the Nine held many traps, hazards, and guardians. It appeared that Acererak liked to toy with his potential enemies. There were clues, riddles, and mazes. All seemed less like something you would build to keep people out, and more like something you'd build to test their metal.
It was likely to get more dangerous as they went downward, and downward seemed the most likely place to find the Soulmonger. But Acererak seemed to be leaving clues on how to find their way forward. Maddeningly cryptic clues.