Disclaimer: Hasbro owns My Little Pony: Friendship is Magic. The plot is not canon and should not be taken as such. I do not own anything that belongs to Hasbro (nor anyone in that matter.) I do not profit from this fan fiction.
Prologue
Every subject of the kingdom of Tendodon gathered around the castle waiting to summon their princess in hope she will conquer the threat that will come upon the entire kingdom at sundown. The stage where everyone was staring at was lined in gold. At the back wall in the center, there stood three blue rhombus shaped markings.
A mare stood in in the center of the stage waiting for the audience to quiet down. When, at last, it was quiet enough, she began, "Hear ye, hear ye! We are gathered today to perform a ritual! This is the eve of the thousandth year anniversary of our kingdom, built by the generosity of the mares and stallions before us!
"Unfortunately, a curse has been placed upon us to fill us with greed. This is why we are here today! This ritual we will perform shall summon the spirit of generosity so she may defeat the greed that will consume us tomorrow!"
The crowd eagerly watched as a unicorn stallion set ten candles in a circle ready for them to be lit. Everypony knew that it was important for as many ponies to participate as possible. They don't want their kingdom to be ruled by greed. They said a small chant for every candle lit. After all the candles were lit, they sang to summon the princess. (I'm terrible with chants and lyrics, so I'm not going to even attempt)
Right when the song ended, the flames simultaneously flickered and grew until the circle was hidden from view. After five minutes, the flames died revealing a unicorn. She looked around confused. Everypony gazed upon her white coat and purple mane. The unicorn that started the ritual bowed down to her and exclaimed, "Princess, we welcome you back to your kingdom!"
The unicorn looked at the mare in shock. "I'm a princess!?" She smiled gleefully at her new subjects, but then the smile went away when she realized that she may never see her friends in Ponyville again.