Story of Nexius

Nexius is a wandering solider of darkness. He comes from a pit of darkness to wander the world. In his travels he has found dragons, killed assassin, and killed his own family. He is someone you dont wanna piss off. He discovered his powers when he was 5 years old while playing in his house. He formed a dark orb and destroyed the wall in his room.

....Alright, really. One sentence? One measly, short, simple sentence is your ENTIRE character history? Please, edit this and add more detail, perhaps a little creativity as well.