Book of Exalted Darkness: Reduci Castle (d20)
Carstigle Wormhand is dead.
The powerful mage was said to have kept an apprentice and yet his lair remains abandoned¸ the many treasures and wonders within left for the taking.
There are defenders of course-creatures left to protect his legacy-but they are unique¸ laying in a cunning and clever trap that has claimed every intruder so far.
What makes you think you'll fare any better?
Book of Exalted Darkness: Reduci Castle is a locale and coterie of NPCs best suited for adventurers between 8th‐10th level. Within you'll find statistics for 10 monsters and castle denizens¸ the Vile school of magic (over two dozen new and truly evil spells)¸ as well as rules on expanded madness (more options for the short-term¸ long-term¸ and indefinite varieties).
If you aren't already in the know¸ check out the Book of Exalted Darkness campaign setting book ¸ and should a quick skim fail to convince you to try out the free Killing the Golden Twins adventure then take a gander at the (also free) Evil Primer and then take the plunge into evil adventuring!