There really is a tomb!
Mu You felt delighted.
And according to the description, the person buried in this tomb seemed to be the owner of Foggy Mountain.
If the fog on this mountain was indeed this man's creation, the game text reminder wasn't wrong, this was someone he truly couldn't afford to mess with.
Of course, regardless of whether he provokes or not provokes, he definitely still has to go in and take a look. If there's any kind of kill-on-door-opening trope, he can easily time travel back.
[You chose to move forward, push open the tomb's door and step inside.]
[You entered the inside of the tomb without falling into expected darkness. Fluorescent stones scattered along the walls of the tomb creating a dim, green light.]
