King of the Labyrinth is a Manga/Manhwa/Manhua in english language, Manga 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

On the tenth floor of the labyrinth awaits the minotaur. Many brave adventurers have challenged this great beast, all have thoroughly failed. "More!" Demands the powerful monster. "Send me more powerful opponents!" This creature blindly pursues strength at any cost. Perhaps it will even grow strong enough to surpass the rules of the labyrinth itself! Can any adventurer hope to stand against such a mighty creature?