The Warrior Assassin

There was this Alpha who wanted more power. So he came up with an idea, The Assassin Academy. So he figured to steal a baby that people don't mind not losing, so he stole a twin of several families all across the world. Then he went on to start the academy. He got the best teachers and got everything scheduled to train them to become the best weapon on earth.
As the kids started to go on missions they started to gain notice of this very powerful Alpha. The biggest and baddest of them all. What the Academy's alpha didn't know is that he just might lose his best assassin to the baddest being there is.