I am at episode 8. It was going well until episode 5. The flashback episodes (6-8) broke the momentum. Almost seemed like it was another drama and the overall plot and dialogue of flashback was weak during those episodes.
What's the point of having Kim Seul Gi and Oh Dong Min in main roles when they barely get a scene in the first 4 episodes? Jo Han Chul has been miscast. He's overacting a lot. Also, Jeon Gook Hwan seems to be in the same evil old man one-dimensional role.
It's barely six since years since he entered k-drama land, but he has done a marvellous job. This guy knows how to pick the right scripts and plays his roles well.
There were many plot holes but this drama was entertaining as hell. It's arguably the most entertaining and binge-watchable k-drama so far, at least in the fantasy genre.
1- They both lose their powers somehow and live happy lives as normal people.
2- They both die due to their powers.