This is but one of the legends of which the people speak...
Long ago, there existed a kingdom of great peace and prosperity. Ruled by two regal sisters who held Harmony in their hearts, it flourished and became a beautiful land. However, many years ago, disaster struck this peaceful realm.
A child with darkness in his heart came across an ancient, forbidden power. Using this power, he attacked the helpless ponies of the peaceful land. He almost succeeded in killing everypony in the kingdom and ending the world. However, when all hope had died and the hour of doom seemed at hand...
A mare with a brightly colored mane appeared as if from nowhere. She called upon the Magic of Evil's Bane, and used it to stop the child and restore Harmony to the land. She became known as the Hero of Time and sacrificed herself for peace across the whole world. Those that were left behind rebuilt the land to its former glory, and the Hero's tale was passed down through the generations until it became legend.
However...
The child's hate was so great that he was resurrected into a new body. His evil plans returned with him, threatening once again to destroy the world. Though they were scared and frightened, the ponies of the land did not run from their fate. Instead, they turned towards the remaining regal sister, the youngest, for guidance.
What became of that kingdom...? None remain who know.
The memory of the kingdom vanished, but the legend survived on the wind's breath. One day, the good ponies of the world hope to discover the kingdom's fate and complete the legend. For now, however, it is but a story, a myth. A tale of old.
The Legend of the Hero of Time.