Moon Embracing the Sun
해를 품은 달 (original)
Years after she's assumed dead by the palace, a young noblewoman, now trained as a shaman, returns to court to reclaim her rightful position as queen.
Starring Kim Soo-hyun, Yeo Jin-goo, Han Ga-in, Kim You-jung, Jung Il-woo, Lee Tae-ri, Kim Min-seo, Kim So-hyun, Sunwoo Jae-duk, Song Jae-hee
Watch "Moon Embracing the Sun" on Rakuten Viki released in 2012. It's a drama and sci-fi & fantasy show, and has a rating of 7.9 out of 10 from Imdb which is usually fine for this kind of show, and is currently available to watch for free.