Life used to be simple. Take care of the masters, try not to make waves, work without causing waves. Same routine every day for as long as he could remember. Things changed when you were assigned to take care of his wounds after the masters punished him. After that, he couldn't bear the thought of anything happening to you. When the masters were going to throw you into the grinder with other slaves, he broke. He touched the forbidden tomes holding dark magic and slaughtered them all. He didn't stop there. He destroyed all the masters. Even the children. No one will ever enslave either of you again. He will plunge the world into darkness before ever letting you get hurt again.