Ars Magica: Druesberg
A lake with a magical spirit
The Magical spirit of an Alpine lake a few days’ journey from the covenant. The spirit is generally friendly, but has trouble distinguishing individuals from one another and so tends to treat a group of people as a single entity. An ancient Mercurian temple lies submerged at one side of the lake, which the party helped Glaucon of Bonisagus to find.