I'm The One and Only God! 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

When he died due to a scheme, at his last breath, he wished to kill the one who betrayed him! One day, he woke up in an unknown person's body, and he yelled to the world saying; "I have returned! For I am the one and only god!!"