Aetherz

I'm usually not a big fan of action and even less of horror, so I was pleasantly surprised that I enjoyed this drama so much.
It's not as horror as one might expect, more focused on action than trying to be scary, which might be a turn off for some who are intrigued by the series being marketed as a horror.
That said, and it seems like it's pretty much an agreed upon, common opinion, I loved the design and visual effects, which is definitely what I enjoyed the most here (especially the Ggeomeoksali, which is safe to say is a fan favourite.)
What to say about the casting? both Roh Yoonseo and Nam Joohyuk are amazing here, and I liked their respective arcs and especially the constant bickering between each other.
I think its weakest point was how the story was handled in some parts, but overall it was great. The story starts off slow, using the first four eps as a sort of prologue, and what got me confused was the whole shaman sidestory, Gucheon's background and relation with his mother and the constant plotting for the throne explained through flashbacks and events that happened prior as the plot progresses, which sometimes got me asking what was going on and trying to connect the dots, but maybe that's on me.
The ending was the kind of tame but smooth one that leaves you going back to all of the events that you've seen unfold without a big climax made to wow you.
If you haven't yet, do yourself a favour and give this one a watch.