Episode 7: It was revealed by the other artifacts that the "blind girl" = the "ice stone".

Episode 8: It was revealed that the ice stone is in the possession of the queen.

What are your theories? How can you reconcile the two? Share your thoughts below!

Mu Deok blue eyes kinda look like Ice stones. Could it be that the Blue marks after a AoS  somehow due to the Ice Stone.

Maybe Mu Deok had the eyes even before  Naksu's AoS and that is why she covered her eyes.

At some point in the fight for the stone someone might have split the stone and maybe the other dominant part of the stone grew consciousness and manifested "real" Mudeok's body  to protect itself. It imprinted the body similar to that of the rain ritual woman ages ago as she was the one to bring the ice stone into the world and continued to live among the people. This could explain why captured Naksu's body was soulless and her reflexive power surges whenever she or Uk is in danger. The blind Mudeok could be the stone itself, since she enters and controls the soul shifting realm. By this way, Naksu wouldn't have to leave the body in the end and hope for a happy ending...