Read a manga half a year ago went to find it was about a martial artist?
After a long search I finally found the manhwa (Korean comics) I was looking for.

It's name is Sword of the Emperor




  Synopsis
  
  A young Emperor is cast out of his Empire by his uncle, who seizes the
  throne for himself. The young Emperor sets out to become the strongest
  among the living, and take back what is rightfully his.


So thanks for everyone who looked for it or at least tried to think about it :)