Damn, I seem to remember liking this, but coming back to it, it really seems worse than I remember.
The plot is perfectly serviceable as your generic overly-serious korean power fantasy, not exactly groundbreaking but I've definitely read worse. If you like that kind of thing (I usually do!), you want find too much wanting.
I think the bit that really fails it is the art, and not in the way it usually fails. Literally any panel involving motion seems to have far, far too many motion lines, effects, sound effect text, and just general shit in it to make it easy to tell what the fuck's going on. If it was the occasional doublespread or intense action scene this'd be acceptable, but since it's meant to be an action strip it's like a solid 50% of the fucking art. I literally do not have the time to strain my eyeballs to work out where characters are and what they're doing.
It's kind of unfortunate that the long strip format really seems to let it down in this regard. The author has had to result in literally tilting scenes to 80 fucking degrees to try and fit in the scale and detail of what they're drawing, and it just really ruins it.
Again, it's kind of sad because most of the other stuff is pretty good. The detailing work and (non-human) character designs are good, and kept me interested longer than I think I would have been normally. (The human designs are the standard either over the top or overly serious designs that I can't ever seem to quite stomach in these (usually korean) strips.)