The Knight of Embers 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

His only family, his younger twin, has been murdered. He isn’t as talented as his late genius brother, but in order to get his revenge, he will become “strong”. Will I be able to get my revenge?