A Ticket to Midnight

A One Round Living City High-Level Planar Adventure Planar Campaign Adventure #1 From the introduction: Numerous trips to the Astral Plane have discovered a Great Machine in a former githyanki fortress. Rumors abound as to its connection to the Heart of Bane and the threat that it may pose to the entire Vast. It falls to the heroes of Ravens Bluff to discover the truth of the matter.