Khartoum takes Mozenrath's power at one point in the episode. I'd LIKE to think that Mozie's power returned when (spoiler!) Khartoum and the book were destroyed, but that is never confirmed.
About the Philosopher's Stone....unlike a lot of the stuff on this show, this was a real myth believed by a lot of people in early AD. However, its use here is off-base anyway. What the Philosopher's Stone was really supposed to do was change any metal into pure gold. That's all it was supposed to do if it existed...it didn't give you "all the powers of the cosss-moooss" like Mozenrath said it would a billion times. Hmm....on another note, it's awfully convenient that it self-destructed for no reason....lazy writers.
Mozenrath: (about Eden) Now I know this Genie's one gumdrop short of a fruitcake!
Mozenrath: Aww, how cute. Genie's gotta girlfriend!
Xerxes: Girlfriend, girlfriend! Tee hee!
The Book Of Khartoum was also mentioned in Disney's Talespin.
Its the return of Eden from " Some Enchanted Genie".