Wintertusk is the next area after the side world of Grizzleheim, a world that serve as a habitat for wolves, bears, grandels, ravens etc.
It has a very cold atmosphere and hence you will be facing foes for quite a number of times.
To get access to the area (Wintertusk), you must complete the Blood Brother quest. This quest is the final storyline quest in Grizzleheim.
The quest Cold News is the quest that will get you on an introduction to Wintertusk. The headmaster is the one that gives it to you.
Note; you must be at least level 40 to begin the final area of Grizzleheim (Ravenscar).
Drops in Wintertusk are subpar at best. The gear there heavily resembles that of cavemen and bear like, Viking looking outfits. They can be sold for decent gold amounts though.
The quest there as well provide large amounts of experience and certain quests lead to school only spells that can only be learned here.
You also get your level 58 school pet by venturing through the world as well.
Also located here are excellent gear crafters, one in an area called Vestrilund. He sells pretty good jewelry among other recipes. Another is located within another area (Sudrilund) where he sells excellent level 56 crafted gear I highly advise you use if you are around that level area.
That's a 'giss' of the world. It is not easy as it is a huge step from Grizzleheim where mobs can critical and block and use strong spells, especially the .
foes for quite a number of times.