Blackroot Trudge

From the designer:

Blackroot Trudge is adventure/dungeon for Mörk Borg. It is designed to be used in a campaign in any forest or as a one-shot: perhaps the PCs were asked to investigate the recent disappearances in the local village, the lack of game in the forest, or perhaps the crazy old men at the tavern swore they “saw a bleeding tree”?

Nevertheless, as the PCs wander through the forest, they encounter a tree which oozes blood - all it takes is one PC to remotely approach the tree and roots shoot from the ground, dragging all the unfortunate souls of the party underground.