Not just birth secret, the King's star thing has not done anything yet. I would like to see Madam Dohwa's name…
I died the part Buyeon/Mudeok told Naksu/Mudeok 😂 I want to go crazy with these names.. lol Yes, Uk's power is in the progress, but he wants to take ice stone out.
I'm starting to think that he wants to repeat the King's star and Jin Priestess love story/combination for a better…
I always feel like it was more than two people's romance, it was more like companionship, it's also possible that Master Seo Gyeong also needed Jin Seolran's divine powers to level up his King's star energy (seven stars thing). It doesn't matter if Seolran was his lover or not. These two need to meet and team-up to stop the chaos.
I'm glad I don't see those. He is in the mourning process, not in the romantic mood, lol.. He has been slowly swayed by her, and couldn't say romantic words, but still did everything he could with actions.
2 
Yes, Uk's power is in the progress, but he wants to take ice stone out.
First, Naksu's memories + Jin Priestess powers is a combo, one will return along with the other.
Second, Uk needs Jin Priestess's divine powers to remove or get rid of ice stone, in a way he is going to die 😭
Third, Naksu's mage powers, it is only possible after she regains memories.
It doesn't matter if Seolran was his lover or not. These two need to meet and team-up to stop the chaos.
He has been slowly swayed by her, and couldn't say romantic words, but still did everything he could with actions.