I really hate to keep sounding like a broken record, but sorry for taking so long to reply. I've been busy, and a bout of demotivation has taken hold on nearly everything I'm involved with. I think if this becomes a habit, I'll see myself out just so I'm not continuously holding anything back like this - it's not fair to you guys to have to wait on me.
Anyways, I plan on getting a post up tonight, but I do have some questions concerning the sacrifice of warmth to the Frostmaiden. I'm not sure how much of this Kythor would really be aware of given his status as an outsider and someone who's lived on the fringes of Icewind Dale, or if his tribe would even practice something like this or if they'd even be aware given their mostly-isolationist status. Is the offering made to Auril usually in the form of a living creature, or if such a condition cannot be met, are there alternatives?
Although I do plan on trying to get something in tonight, I'll edit my post as necessary later to make his response more appropriate to his knowledge/thoughts on the matter.