Look the author isn't the sharpest tool in the shed. We're supposed to believe that for more than a decade, nobody, including multiple corporate peons for whom it is literally a full-time job, ever realized that a "riddle" containing the phrase "in a tomb filled with horrors" was pointing towards The Tomb of Horrors. You know, just probably the most famous D&D module there is? The first thing that I thought of the moment I read it?