Pale Throne 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.nl fastest updating comic site. The Summary is

Young Bai accidentally kills someone, from then on he enters the world of killers. A black card appeared in front of the door of pale throne, who can get the ultimate weapon left by the Killer KingNightX, the most successful killer? To kill, to follow the road of killing, is also the road to finding oneself.