Reincarnation Of The Heavenly Demon 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

Cheon Ha-jin, the supreme leader of the Iron Blood Alliance, wakes up in the body of “Byukli Dan”- the disgrace of his family! His hobby is gambling, and he has been locked in a dark warehouse for a long time. Once a supreme martial master, Cheon Ha-Jin became the renowned trash overnight. Let’s start again to reach a state I could not achieve in ny previous life.