The Masked Horror

He came out of nowhere after a cataclysm of magic.

And just with that, the world turned upside down.

First, the Princesses were amazed by such a different, mysterious and curious being. They accepted him with open arms, not knowing the huge mistake they had made.

A puppet master, he achieved more than many warlords and Celestia's enemies would dream of conquering. He created a huge gap between the three pony tribes and hate that lasted for generations, planted the seeds of doubt in Luna, and managed to create a warrior culture in the Griffins that was socially opposed to Celestia and its 'cowardly' pacifist culture.

Somepony extremely mysterious and brutally effective. In less than a decade he achieved all this, and in two, he created a division between the sisters of the moon and the day. But despite being a genius and an extremely powerful figure, he and Luna were defeated in the end, making him become a statue by the Elements of Harmony.

However, she did not have the same strength and heart to do the same with her sister, instead banishing her to the Moon.

Thousands of years have passed since the events, and his legend remains on the loose, being considered the only mortal who managed to deceive two goddesses and at the same time manage to match them in all aspects.

For all these thousands of years, he was respected, hated, but most of all feared.

And one day he would come back, and when he came back, he would change the world again in his image, no matter the cost.

This world would learn the fury of a Shinobi