What is the name of the audio that plays when the gray king appears in K-Project? I've done a bit of digging but I can't find the track anywhere. It's in episode 7 of return of the kings (the second season). I'd like the title of the track and if possible a link to download it. I really enjoy it's melody and would like to listen to it more often. 

Does anyone know who made it or where I can find it?
After some more digging I found that the track is called K vs K from the OST a link to the track here https://www.youtube.com/watch?v=bWjCr2bx9XU