Øone's Blueprints: Drow Outpost
... . At level 1 more arrowslits rooms are found plus a temple area dedicated to the spider
queen. At level 2 the commanders quarters are located, large and full furnished rooms ... turned into undead and are attacking the nearby country.
A priestess of the spider
queen seeks an ancient
evil artifact into a ruined drow outpost, the PC must stop the priestess.