It Turns Out That I’m The Demonic Ancestor! is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

The almighty Yun-Ye is now reaching the end of his life. As the eight factions that have claimed to be righteous knew about the end of Yun-Ye's life, they launched an attack against him. At the same time, a person with the same name has traversed and took over the body along with a system, and he has now started the path to eliminate evil and spread righteousness. Yun-Ye is able to earn points by completing system missions, then use them to trade for vitality. He will then slowly lead his six disciples and take back the treasure and legacies that belonged to them, and slowly expose the dark side of the eight factions.