I've got a crazy idea... What if Mu Deok, Naksu, Jin's eldest daughter are one and the same person...LOL
Crazy theory 1: What if when the Jin's eldest daugher was kidnapped when she was a child and her soul was transferred to Naksu's body, and she forgot that memory. So when Naksu used the soul shifting technique again, her soul simply went back to her original body....
Crazy theory 2: What if her soul was split when she was young?? One was Mudeok and the other was Naksu?? And now, it simply combined...? (LOL, blame me for reading too much wuxia/xianxia novels)
Crazy theory 3: (after watching ep 7) Mu Deok is the ice stone...? Or maybe the ice stone merged with the Jin's daughter which is now Mu Deok....
(Damn, should not have watched ep 7 while typing this, now my brain's so scattered... >.< Still, so many theories before but now its been crossed out...LOL)