Dead Knight Gunther 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

The war between humans and vampires ends with the victory of the vampires, as everyone expected. After hard work for mankind’s counterattack in ‘Bahal’, a holy land that has not yet been invaded, Succeeded in producing an immortal ‘corpse knight’ and a ‘power source’ that can move him, ‘Gunter’, who was a gladiator, is brought back to life as a ‘corpse knight’.