I Have Become a Demon King and My Will to Survive Is Full.

My name is Leon, a professional demon king and a level 1 black iron. Now the brave Holder is here, and I will kill him, or be killed by him. Good, he only has a broken wooden sword and it won't be too much trouble to deal with him. Oh, there are actually battle rewards. It seems that being a demon king is quite promising. ………… The situation is not good, the brave Holder is here again, this time he has an extra piece of cloth armor. I'm going to kill him. ………… This young man has no martial ethics and actually led a group of people to beat me up. Magician Martha, right? Give me death. ……………… A team of eight people, with halos on their heads, wings on their backs, and enchanted costumes. Damn it, I just want to live, what's wrong with me