Senmetsumadou no Saikyou Kenja: Musai no Kenja, Madou wo Kiwame Saikyou e Itaru 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 world's strongest magician who carries "the crest least suitable for battle" searches for companions to fight together. The ones fit to be his companions would be...!? One more otherworld "crest" fantasy gets turned into a manga!!