A free adventure created cooperatively by members of EN World.
From the publisher:
The marilith, Blasphemy, has spent many years building up her complex and gathering minions to her aid. It is up to a strong group of adventurers to remove her from this plane, permanently, either for the good of all or in an effort to replace her as a rising evil force for others to fear.
With thirty encounter areas, and many traps, this adventure is big enough to be run over several sessions. Although designed as a 14th-level adventure, many of the encounters and tactics used by the creatures within border on the VERY difficult side. Experienced DMs might want to be prepared to give their players a break if they begin to complain, cry, or whimper...