(A/N: Sorry for the super long hiatus. For a while now, I just couldn't write as much as I used to. School, work, and depression are attention hogs. But I'm writing again and it feels great. So I will try and finish this story, which definitely needs a major rewrite. So please reread and bear with me while I rewrite and do this story.)
Prologue
A cloaked figure watched two young ninjas fight at the legendary Valley of the End. They both displayed amazing power for such young teens.
'Hmmm, one of those boys would make an excellent subject for my experiments. They both have such strong bodies, they're young, and considering the present circumstance, it would be the perfect time to take one.' The man thought with glee. The cloaked man's eyes widened before narrowing as he saw the raven-haired boy's skin become darker and hand-like wings sprout from his back. He also noticed the blonde's eyes become red and slit and red chakra bubble around him. The man gasped in response at the sight of the two: the raven clearly had Orochimaru's curse seal and the blonde was jinchurriki- the Kyuubi, based on the fox-like chakra cloak. He watched critically as the boys struck each other with their final attacks, which knocked them both out. The man quickly made his way over to the unconscious boys.
"I'll have to take the jinchurriki. The other is tainted by that snake's mark; it will just get in the way of my experiment. And besides," The man's smirk curled into a wicked grin. "A jinchurriki will be a much better, especially with his healing abilities." The hole in the blonde's chest was already stitching itself back together. He carefully grabbed the boy before quickly leaving.