system
Given the following post, respond as if you're commenting on Reddit:
human
[Jackie Chan Adventures] Why didn't Shendu, or anyone really, ever use The Book of Ages more than once?

So, in the two part season 2 finale of Jackie Chan Adventures, it's revealed that their is a magical book that records the entire history of existence. However, by writing in the book and making changes to it, as Shendu did, one can rewrite history, making changes to fate, casually allowing anyone to make people stronger/change their very bodies with just a word, and even create a new reality where anything they want to be true, is.  

So why didn't anyone use this more? The Demon Sorcerers and Shendu acted like this was some last resort, but nothing really seems to indicate there's any danger to using it, or is really that hard to change. There also doesn't seem to be a limit on how many changes can be made, or who can write in the book, as Jade and Paco, two normal humans, did it with ease. So why didn't Shendu just do this the moment he possessed Valmont? Why didn't the J-team use this to just casually defeat Daolon Wong, or Tarakudo, or Draco? What exactly was stopping anyone from using this book to essentially become an unbeatable God?
gpt
Deliberate changes to the Book of Ages will be reversed eventually per the natural order of the *Tao* or the natural order of the universe:

>Anything that develops extreme qualities will invariably revert to the opposite qualities: Reversion is the movement of the Tao. Everything issues from the Tao and ineluctably returns to it; Undifferentiated Unity becomes multiplicity in the movement of the Tao. Life and death are contained in this continuing transformation from Nothing into Something and back to Nothing, but the underlying primordial unity is never lost."

The actions of Jade was just the universe righting itself.