A One-Round Living Greyhawk Geoff Regional Adventure
From the introduction:
The two moons of Oerth, Luna and Celene, continue their dance across the heavens. Slowly their faces change to the match the ancient chart. The time has come. The key is turned, and the gate opens to a prison fashioned from time itself.
A Grand Duchy of Geoff regional adventure for APLs 8-12, and Verse Three of the Song of the Queen in Solitude.