Demon Blade is a Manga/Manhwa/Manhua in english language, Manhua 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 prince killed his father and ascended to the throne, the world is in chaos . In order to save the humans, Xu Han, a beggar, rebelled against the assassin organization [ hell asura clan ], cutting down ghost, gods, demons, immortals, and overthrow the tyranny with his friends to return the world to peace.