Okay, first, I stil couldn't get used to this kind of fantasy drama with various power and things. So, sometime I found it irrational, but that's no offense it's my personal preference.
Two, the story was pretty much entertaining in the first 20 eps, but got boring after. I had to watch it in 1.25 faster mode instead of normal mode. Sometimes I even had to skip it.
And I don't get the two woman (sisters) from that sect could be that annoying, that sister obession in reviving her husband's memory is just toxic.