A One-Round Living Greyhawk Nyrond and Her Environs Meta-Regional Adventure
From the introduction:
A letter, a dream, and the promise of a journey: this is how you got involved on a rather unique voyage on the Nyr Dyv. An old worshipper of the Sea Dragon’s dream of his youth may get you involved in more than a simple boat trip. This adventure is not for Asherati characters.
A one-round meta-regional adventure mostly set in the County of Urnst for characters level 4 - 15.
This adventure may run long, especially at higher [levels]. Players and [Dungeon Masters] are encouraged to be well-prepared when running this adventure.