Svala Sorrowgrave is the first boss of Utgarde Pinnacle. She is a vrykul who is being transformed into a val'kyr by the Lich King as players enter the room that she resides in. According to her intro quote she appears to have done a great service for the Lich King to be transformed and gain new power as a val'kyr. It is unknown what she accomplished to gain his blessing. Regardless, as the Lich King informs her of your group he assigns her to kill you.