Demon King

Demon King (Maou) is the entity who raided human civilization by leading his demon army.

Description
It is said that the demon king is highly hostile to humans for some reason. Should a demon king be born, he will lead an army to invade the other civilization. In the past wars, heroes have defeated demon kings. will not perish. When a demon king dies, a new demon king will be born.

Battle Cycle
As said earlier, a new demon king will be born when a demon king dies. the latter's condition will do the same.

Should a demon king revives, a hero is awakened.