The Servant of Zero

In a certain universe, there were thirteen ruling gods who stood at the apex of existence. Directly below them were the upper gods and lower gods, who managed the mortal worlds. All this had nothing to do with William, the servant of one of the thirteen ruling gods, until one day. That day was the one where the clan Willian served was uprooted, robbed, and exterminated to the very last man. Naturally, William died along with the rest of the clan. -at least, that was what was supposed to have happened. However, he instead reincarnated into the body of a cruel and spoiled young master in a rich clan. With the weapon of his past lives memories, the boy swore to rightfully get back at the people who took everything away from him. This is a story of revenge, and also...