A few weeks ago, a neogi flying ship met with misfortune in a furious thunderstorm as it was setting out on a long journey. Heavily damaged, it crashed on an isolated rocky beach. Several neogi and their slaves were killed or injured in the crash, but five of the small monsters survived, along with four umber hulks and a handful of other useful slaves. Under the leadership of the sorcerer Neex Hist, the neogi are working to repair their ship so they can continue their interrupted voyage. In the meantime, they have set up camp in a large sea save close by the site of the shipwreck. While the repairs continue, the neogi and their minions are scouring the area for anything of interest - there's no point in leaving potentially valuable merchandise in the vicinity of the crash site, after all.
Akeni was born a servant to a powerful drow family deep underground, but her personality was anything but servile. When she was caught in an affair with the house matron's mate, she killed the matron and her own paramour and fled, eventually stumbling into the lair of a powerful beholder mage named Ormathulak. Akeni knew immediately that the creature was just the ally she needed to wipe out her hated family.
The Sinister Spire describes an underdark city the the necromancers tower that is in it. The adventure is the second part of the 3 part series though it can easily be played on its own. The Adventure covers getting to the underark city of pedestal, The city its self, an island of luminescent fungus, and the Spire its self. This adventure can also be used just for the underdark city.
This adventure brings players investigation the disappears of local craftsmen. If they fallow the clues it will lead them through the outland city of Rigus to the plane of Acheron. They will then find the Iron fortress and the warlord Imperagon. The adventure describes one of the cubes named Kolyoral. There are multiple agents at play on the cube as well as the imposing fortress.