Honestly, what a sublime piece of work. It is by no means the best manhwa ever written, but my God was it entertaining until its short hiatus. This is one of those murim manhwas where mc can travel between the murim world and modern world.
Story:
MC Strong, cool fight scenes and get romantic partner, ooga booga. But here's the thing, its fight scenes are grand and the story actually progresses. Revenge plots are scattered throughout the as of now, 270+ chapters leading to some of the most badass moments. The story also gets especially interesting as we move onto the Middle East arc, presenting me with some of the coolest characters. The first 10 chapters may get confusing if you don't read it carefully enough, but it gets better afterward.
Art:
While its art may not be as grand or lusciously drawn as some other manhua/manhwa, it stays consistently great for the whole duration. So I do not have much to say about it.
Characters:
It's almost as if the author has an obsession with stopping mc from obtaining happiness. His romantic interest is also great, she tries not to be entirely reliant on mc and has her shining moments. The side casts were also great, the leader of the murim alliance, the nun assassin, and the office worker were all pretty cool.
Overall:
If you want a rollercoaster ride, then Devil Sword King is what you're looking for.