Old Nordic folklore/mythology in a modern guise. Well implemented. Good special effects and good sound effects.

[spoiler]I liked that there were images of Theodor Kittelsen and also the story with the return to the royal castle and the emerging Christianization of Norway, against which the trolls feel a natural hatred.

I also liked the beginning: Mankind pushes too deep into nature and thereby awakens something ancient.

Which also fit like a glove: The scene at the end, which was musically perfectly staged by Edvard Grieg's "In the Hall of the Mountain King".

This leaves a good open end, which leaves the option open for a second part, which will not be easy to implement, however, because in that case a good story must then be told to the end or further.[/spoiler]

The story of the film was of course very simple and, as with many films, you already knew what was going to happen. But the sidejokes were funny.

So overall a good and entertaining movie you should watch if you like the Norwegian folklore/mythology topic.