Hew Gruntruck

Description
This boss is basically just a super-Mergoyle depending mostly on the same skills they use. He does also have Ether Feast though which he will use when hurt, so he won't die quite so fast as your average Mergoyle.

He will typically come in a group with 2-3 Bog Skale and 2-3 Mergoyles. The skale will take more work to dispatch than the 'goyles because of their Life Siphon, so I would focus on them after killing the mergoyles. In this fight I would save the boss for last; he doesn't do too much damage but can take a bit longer than usual to kill.

Location
Hew Gruntruck has been seen on the northern coast in Watchtower Coast, directly north east of Divinity Coast. Head east out of Divinity Coast, then turn north at the first opportunity. Follow that path all the way to the shoreline, then explore east along the shore. When I encountered him he was sitting on a small island just offshore.

Skills Used

 * Ether Feast
 * Mantra of Lightning
 * Mind Wrack
 * Spirit Shackles