There is no evidence of any "ugly creature in the form of men" lurking in the northern forests of Scandinavia. This sounds like a fantastical element from folklore or mythology.

If you are thinking of a specific creature, please provide more details.

Here are some possibilities based on Scandinavian folklore:

* Troll: These are often depicted as large, ugly creatures with a taste for humans, but they can also be mischievous and helpful.

* Nisse: These are small, mischievous house spirits who are often associated with farms and the countryside. They can be helpful or harmful depending on how they are treated.

* Huldra: These are seductive female spirits who can lure men to their deaths. They are often described as having a beautiful face and a cow's tail.

* Draugr: These are undead warriors who haunt their burial mounds. They are dangerous and can attack the living.

If you are interested in learning more about Scandinavian folklore, there are many resources available online and in libraries.