Yin Yang Law

Just as Humanity celebrated the coming of a new millenium, an event of catastrophic proportions happened. In a matter of minutes, Humanity had to deal with the first contact ever with other races. And it was quite the shocking first contact. But humans were known for their ability to adapt to any situations. And so, many years after, just as Humanity finally started to accept the presence of other races on it's territory, they were given something.......Something truly special. The Yin Yang Law was born, and it didn't take a while until the most corrupted minds decided to milk it for all it's worth. That is the case for one man, or maybe monster would be more adequate ,for no one wanted to consider him a human. Unfortunately for those who followed the way of justice, this particular man felt bored one day. So what would be better for the most hated Villain in the world, than to suddenly become a hero ?