A Multi-Round Living Greyhawk Adapted Adventure
From the introduction:
The waters of a sunless sea meet a pebble-strewn shore, beyond which opens a wide Underdark vista shimmering with pale cave-light. Titanic columns as big as castles march miles into the misted distance. The wide, steeply sloping base of the nearest colossal column is cared with streets, walls, and elaborate structures, many with gaping, empty windows. A few glimmer with faint illumination. Are you brave enough to explore the spire-city and face the terrors that lurk within?
[The] sequel to ADP7-05: Barrow of the Forgotten King. It is strongly advised to play ADP7-05 before this adventure, but it is not required.
A copy of DD2: The Sinister Spire is required to use this product.