The dungeon is essentially a large puzzle built around the premise of time travel. Many PC interactions are a direct result of the party dealing with the actions of their past or future selves. This adventure is designed for a fifth level party, to be played in a single session. It features a large full color map, artwork, NPC roleplaying tips, and two new magic items. Julinda the gnome mage has always been a bit off. She is a chronomancer who has become obsessed with achieving the reliable and reproducible technology of time travel, in the interest of returning to select parts of history and influencing their outcome to her pleasing; perhaps to avert a war, or to head off the enslavement of her people, or prevent the death of a loved one. Those who know her were aware of her ambitions, and now worry that they are coming to fruition, as she hasn't been seen in several months. And so, they have implored the PCs to seek her out...

There is the well-known regional legend of Iptiz, a spirit naga whose greed was remarkable even among its own kind. Murderous raids and relentless pillaging yielded a hoard so valuable that the creature needed some place to store and protect it. Thus was the Vault conceived: an underground complex custom built to destroy anyone who is not its creator. Years ago, Iptiz's campaign of terror suddenly ended without precursor or cause. The location of the Vault was never discovered. Until now. The ring-city of Sulindal, built upon the shores of a mile-wide desert oasis, has come under martial law by an invading army of yuan-ti. They intend to exploit the resources in this renowned city of knowledge to locate the third and final Beacon of Selune. ...but for what purpose? A four to six hour adventure for four 5th level players.