The mist is cool, but it's a trifecta of rough 1) hard monsters that hit like a truck, even with 99+ armor and shield 2) uneven terrain (huge ups and downs) with water at the bottom and 3) little or no visibility when fog hits.

It is fun, very excited to play, but very very punishing that makes Plains look and feel like a walk in the park (very bright, open spaces, even terrain, etc). It feels like a very very steep cliff of skill from what plains was, and even if the difficulty of Mountains and Plains were combined, it would not be as hard as Mistlands. Great challenge though, really testing me which was what I was hoping for.