Image imported from derpibooru 
Original Description:
 
Fading spark
 
The magic of friendship was helping me and my friends keep harmony throughout Equestria for many moons. But when the last of my friends passed away, I was left alone.
 
Of course, I found allies who were always by my side, but they could not replace my friends. Soon I noticed that with each passing year, I became more and more indifferent to my subjects. In less than 1000 moons, the ponies began to notice my callousness. After much deliberation, I left my throne.
 
Then I dedicated myself to creating this dimension. I don’t know how much time I spent on research, but I did it. Here I can live through favorite moments of my life. See my friends and family again. I understand that all of this is not real, but the emotions that I re-experience here fill my heart with joy.
 
What? No, I will never return to Equestria. Even if I wanted to. My physical shell no longer exists. All leftovers of my magic are aimed at maintaining this dimension. And I feel like it will soon run out completely. Therefore, you should leave this place.
 

 
Thank you for reading this little piece of headcanon! I apologize for any grammatical or semantic mistakes. I am not a native speaker and I’ve never wrote fanfiction-like things before :b