Mürky Bog

This place was created by an ancient cult that locked something away behind the door (treasure? another dungeon?). This door can be opened in two different ways, but a mistake leads to death or worse, the curse of the frog people, doomed to live forever in this swamp beyond the end of the world.

Treat with the village of the frog-people, uncover what happened to the mining expedition and that staff they took that's needed to open the door, avoid a giant rampaging zombie mammoth, mistakenly think you need to sacrifice one of your companions.