The Sky’s Teeth Walkthrough
The mission starts after you open the gates of Vinbarr’s Sanctuary in the same-name quest. Go up the mountain until you meet Vinbarr. You’ll have to defeat the king: he will start fighting as an ordinary man and then turn into a monster. However, only his aggressiveness, range and attack power are boosted. Other than this, he uses only the power of his sword. Once you have defeated him, interact with Constantin.