The Patchwork Hero 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

Arikawa Ougi, 16 years old, suddenly found himself reincarnated as a zombie?! Embarking on a journey to subjugate the Demon Lord as a zombie hero, but the use of "power" requires a "price"...? A dark fantasy in another world.