Module (Mission) Ideas

A landslide (or mining project) uncovers… a buried object.

Turns out it is only the tip of an ancient tower.
Break through this tip and you break whatever ancient magicks held The Nasty Thing™ imprisoned.

If you carefully excavate your way around it like an archeologist you find the entrance at the bottom and get to explore (and loot =) the tower without freeing The Nasty Thing™.