After months of speculation, Game of Thrones has finally cast Styr, the Magnar of Thenn. So now seems like a good time to reveal just who Styr is. And also, what in Westeros is a Magnar of Thenn?

Warning: This article contains spoilers from the A Song of Ice and Fire book series. Click away now if you don't want to know!

Styr is the ruthless Magnar (Lord, in the old tongue) of the Thenn, a clan of wildlings. The Thenn are somewhat different from the other wildlings we’ve seen up to this point. For one, they are more organized and, some would say, more civilized than other wildlings. They operate as a cohesive military unit, and have a Magnar-based hierarchy similar to the Lords South of the Wall. They also don bronze armor and weapons, making them more formidable in battle than the fur-clad, stick-wielding wildlings we’ve seen so far. The Thenn also speak the old tongue, the same language as the giants, as opposed to the common tongue spoken by Ygritte and company.

Styr is the leader of the Thenn, and they are devoted to him. The Thenn have joined forces with Mance Rayder, and are going to play a part in the latter’s assault on the Wall. In the books, Styr leads the group of wildlings in the attack on Castle Black (the same group that Jon Snow fled last season). During their time together, Styr and Jon develop an intense dislike for one another. In the show, the leader of this group was Tormund Giantsbane, so it looks like we’ll miss out on the Jon Snow vs. Styr rivalry.

It’s unclear at this point just when the show will introduce Styr and the Thenn, but it could be as a type of wildling special ops force deployed by Mance during his attack on the Wall. And even though they haven’t met yet, we expect Styr and Jon Snow to definitely cross paths next season... and we don’t expect them to get along.

What do you think the show will do with this character? Sound off in the comments below