The Stoll Mansion

Publisher's blurb: A level 12 adventure for 5e set in a cursed mansion, hounded by demons and decay. This adventure contains 3 new monsters and statblocks, new magic items, and a three level, fully mapped out mansion. Traps, combat, puzzles, mystery, exploration, and goodies galore await inside, if you're brave enough to enter the Stoll Mansion.