Listen... Crazy one :
What if that woman in the first episode who was trying to save her son and died ( or almost die it was not clear for me) was from CHOI FAMILY?
I mean she is a well known actress, Yeom Hye Ran . She could perfeclty appeared in flashbacks showing us the the family story... And the Queen could be her daugther . Not the Queen from Seo family but a soul shifter inside the queen.
Flaws: - Its similar to Naks story.
- How the supposed daughter would soul shitf since her brother and mom died because of this...i dont know.
On a side note, Jang Kang did tell Jin Mu that he was doing soul shifting in many people ( i think 8) and it was going wrong ...i mean i didnt remember he really out there doing experiments in random people?! One thing it seems he was only put souls in already dead bodys...dont know.
1. But why he was so obsessed with this forbidden sorcery? i think this is important. he will not do this for nothing... maybe Do Hwa was sick?
2. I think he was the one who went toJinyowon´s vault and take the ice stone or part of it betraying Jin´s mom.
( Yeas i rewatched episode one...i know i know...)