The Chief of Thirsk Hall

It is one of two side quests that involves the Thirsk Mead Hall, the other being Retaking Thirsk. This quest will be marked as failed if Retaking Thirsk is accepted.

Background
I found a group of Rieklings who seem to have taken up residence in Thirsk's Mead Hall. Somehow, their chief has learned how to speak intelligently, and has asked me to assist them with a number of small favors.

Fetch Bilgemuck
The first task the chief asks is to find Bilgemuck, a unique Bristleback. Approach the beast and offer it some bait, such as Horker Meat, and it will begin to follow. Lead it to a small pen by the side of the mead hall to complete this errand.

Collect 10 Scathecraw
Next he requires ten samples of Scathecraw, which he calls "fire grass". Scathecraw can be found all over the island or sold by alchemists.

Kill the Nords
For the final task he will ask the Dragonborn to help him kill some nearby Nords that have been troubling them. If Bujold's Retreat has been visited before, it is revealed that these Nords are actually the previous inhabitants of Thirsk that were driven off by the chief and his soldiers. Accepting to help the chief will cause him to jump out his throne and run outside, ready to fight.

The chief will exit the hall with three of his warriors and give a short pre-battle speech:

"Froo ha cawasy jo la. Karoo taray pelfrik? Felgir paw tuwani barj. Goora! Goora! Goora!"

What this mean is unknown, however it bolsters the spirits of the Rieklings and they will charge at Bujold's Retreat.

Usurp the throne
Once they are dead, the chief will mention that the Dragonborn is too strong and maybe wishes to usurp him, much like he did with the previous chief of the tribe.

"You strong! all tribe-kin stronger with you. But... maybe you too strong. Too strong, want to be chief."

Either option prompts the following: "Strong always fight strong. Old chief strong, me stronger. You stronger? Fight me!"
 * Slow down here. I don't want to hurt you.
 * You're right. I want to be the new chief.

He will then attack. Once he is dead the Rieklings of Thirsk will recognise the Dragonborn as chief and the quest is completed.

Reward

 * Members of the Riekling tribe at Thirsk Hall can be recruited as a follower.
 * While in Solstheim, three Riekling Warriors from your tribe may show up to assist you when in combat if you are outdoors.

Bugs

 * At the third stage of the quest, choosing the "Let's go!" option first may not complete the objective. To avoid this choose "I'm not sure about this." first.
 * In the "The Chief of Thirsk Hall" quest upon returning Bilgemuck to Thirsk Hall, Bilgemuck enters and exits the door to the hall endlessly . Thus preventing you from completing the quest. As of yet, there is no fix.