Am I missing something I'm supposed to be able to do at the cauldron?

I am at the point of the game where I have almost 100% it. But whenever I do runs to the surface I still see empty tables where normally stuff like shops would be. Is there an extra one that I have missed somehow? I have the >!Charon well!<, >!cleansing pool,!< >!shrine of hermies!<, >!troves!<, >!eyes of night and Darkness!<, and >!bounties of the abyss!<