A One-Round Living Greyhawk Nyrond Metaregional Adventure
From the introduction:
Black Prince Sewarndt may be gone, but his legacy remains. One of his former lieutenants has set up a blockade near the mouth of the Nesser River, keeping critical supplies away from Nyrond’s rebuilding efforts. Can your strike force destroy it? Merchants and war refugees from Nyrond, the Duchy, the County and the Pale are counting on you.
An adventure for characters of [levels] 2 - 16.