Invincible Territory 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

I barely ‘escaped’ from my crazy master and made it out into the world of martial arts. But from the start, I get entangled with the Demonic Cult… I won’t be used by them; instead, I’ll use them. That crazy master. Until the day I can give that old monster a taste of his own medicine! 무적지경