Demon God of Apocalyptic Behemoth 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

A bustling city and a peaceful society are instantly destroyed by a sudden apocalypse. Countless polluted monsters flood the world, forbidden zones appear, connecting doomsday worlds, leading to the death of billions and seas of blood. During this time, the silently growing Chen Chu, comparable to a god, steps forward. Behind him follows a towering black behemoth, ten thousand meters tall, resembling Godzilla but even more terrifying and enormous