Now on to Frostburn...

Note that pretty much everything here belongs in the far north.

Branta - Sure.

Dire Polar Bear - Yup.

Megaloceros - These could actually be ok on the mainland, maybe.

Smilodon - Derp yes.

Wooly Mammoth - Yerp.

Domovoi - Yes, everywhere, including the mainland. One might come and live with a master smith or something.

Glacier Dwarf - I'm sure some dwarves live up north. They'd be the only ones with beards, though. In fact, they're probably closer to humans than dwarves, genetically.

Midgard Dwarf - I love these more than I can say. Maybe a couple of reclusive craftsmen of the frostlands, where brave heroes seek them out for their gifts of magical... stuff.

Elemental Weirds - North or on the Mainland, they're in either way.

Entombed - Yeah, sure. Even in parts of the Vallheim, they're probably good.

Frost Folk - Yes, as an evil sort of fey that hunts down people who try to make it across the Strait. Non-playable. Maybe when he strait freezes over they come south to hunt...

Genie, Qorrashi - Oh yeah, sure.

Frostfell Ghost - By now you should be able to tell that I'd say yes.

Frost Giant - Do I need to say anything?

Ice Golem - Yup.

Icegaunt - Uh-huh.

Marzanna - Oh goodness yes. I like this one.

Giant Raven - Yes. Raven Clan Wightspeakers can call these south to serve the Vallheim. Sometimes the choose to stay after they've been released.

Rusalka - Yeah, naked fey ladies are always solid.

Snow Spider - Ok, sure.

Spirit Animals - Can I get a resounding "hell yes"? I've been looking for something like this forever!

Tlalusk - I guess...?

Uldra - I'm always down for fey. They're in. Non-playable, though.

Vodyanoi - Yeah, why not? They're fine.

Winterspawn - Totes, dawg.

Yeti - Mmmmm... Yes.

Yuki-On-Na - Certainly!

Animals - Yeah, all of them, used reasonably.