Curse of Strahd
Mordenkainen led the PCs up the mountain to an invisible doorway that served as the entrance to his extradimensional lair, created using the Mordenkainen’s magnificent mansion spell. Once they passed beyond the entrance, they were in a magnificent foyer with numerous chambers beyond. The atmosphere was clean, fresh, and warm, quite unlike anything they had experienced in Barovia up until that point. The mansion was beautifully furnished. A staff of near-transparent servants headed by Robert the butler, liveried and obedient, waited upon all who enter, serving the PCs mead, ale and food to their heart’s content, as well as sanctuary away from the prying eyes of Strahd and his spies. Within the confines of the extradimensional space, the hold of Strahd was lessened and the effect of the evil demiplane on magic seemed to be weakened.