For those in peril on the sea.
A blue skinned demon with a large Halberd. He is a servant of The Black One. He along with a small army of skeletons kidnapped the remaining crew of the Wave Drake, while the party was away. His task was to remove the spark of light that had landed on the island. The spark of the dead god.
He used his runes and summoned several imps, and then when he detected that the party had arrived to combat him, he sacrificed Red. Each sacrifice would give him power. The party had seen these runes before and knew what they needed to do. Chadarnook fought hard but in the end without the use of his runes he was pushed over the edge of the platform they were fighting on, and was impaled on a piece of debris.