Black Abyss at Dawn 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

A door to a world of monsters emerged out of thin air, those who possess superpowers now bear the responsibility of fighting them. Bai Yu, known as the "strongest", died during his mission. After his rebirth, a mysterious system appears in front of him. Follow his journey back to the top and to save humanity!