My Immortal Demon System

The Wolfenhert continent finds itself filled with conflict as the races residing within the continent are at war deciding which is to become the race to rule all others. As all the races fight, the peaceful Demon Kingdom of Hail is invaded and destroyed by them; the surviving reincarnated Prince Arthur, now know as Lucifer, has to become strong enough to get his revenge on those who wronged him. After being summoned to a strange new world as a hero, he was betrayed killed by his allies, never returning to his own world. Filled with hatred and a need for revenge, he has reincarnated hundreds of years in the future as a direct descendent of the demon king. As he loses everything again, the now reincarnated hero, the saviour of humanity, will become humanities worst nightmare after seeing humanity for what it truly is; he abandons his past convictions and becomes motivated by revenge. With each day assisted by the system, he becomes stronger, killing beasts and clearing dungeons, all for the sake of rebuilding his kingdom and saving his people.