Hidden player (Manhwa) 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

Unable to do anything even after losing his loved one, Jun-hyeok meets the creator of the universe. “Do you want revenge…? Then… eat it.” Jun-hyeok obtained the powerful hidden skill ‘Saturation’, which allows him to consume his opponent’s ability and make it his own. He begins to write down a bloody requiem. At the end, he doesn’t even know what awaits him…