Why is a world as it is? Why does a world exist at all? Is there someone who takes care of it? Are they forever, or do they cease to exist one day?

It began as an ordinary day, when the letter of an old friend reached Celestia, asking to meet the princess again. During their meeting in Canterlot, he cuts some bad news to them.

An adventure begins, that will teach Twilight and everypony more about Equestria, and the world they live in

Previously known as "A Story of Spirits"
I am now looking for a new cover art. If someone is willing to create one for me just contact me.
Thanks to Rill for proofreading. (Chapters 1-4)