"Far be it from me to impugn the mettle of adventurers such as yourselves, but daring the depths of Undermountain merely for fortune's sake is more absurd than kicking a sleeping dragon in the nose for sport. Even so, you've returned for another trip to the Underhalls, so be prepared. You stand to enter the Lost Level this time: Gird yourselves for diplomacy as well as destruction. You'll find the last stronghold of an extinct dwarven clan: Do be good enough to extend the greetings of the Blackstaff to Bandaerl. There's also a dark vampiress who enjoys a good hunt, and be sure to mind the beholders: They're trained to keep you from escaping. "Enjoy, and don't say Khelben didn't warn thee." TSR 9519
Hellgate keep - a name that once made the boldest of heroes shudder in fear - was long ago known as the fair citadel of Ascalhorn, a haven for elves and humans. The the demonic horde of bateezu and tanar`ri destroyd all remnants of real cicilization and turnet it into a den of malevolence. Today, the citadel lies ruined. The mistmaster and the harpers destroyed the keep and ended its centuries-long reign of evil...or so they believed