Sounds like a good example of what the mood of the house is.
A few questions:
1) If the Time Stop stops time for all, how would the players enter the room? Wouldn't they be frozen in time too as soon as they entered?
2) What is md in your stat blocks. Psi? Psionic power points?
3) Would your players have the patience to look at all the paintings and sculptures? I know that mine start getting antsy after 10 minutes without some kind of attack roll
4) A Phoenix egg? Like there is a live phoenix inside it if the players open the sphere?