The Wizard Imani's brave recruits had thoroughly bested the Cult of the Dragon in the Temple of Bhaal. Now it only remained to acquire the last of the four Bhaalite Idols and to use them to unlock the Dracolich Dretchroyaster's Inner Vault, where unknown dangers remained. Battered and worn as most of the adventurers were, it was agreed that some of them would stay and rest while a smaller group ventured forth to find the Treasure Vault.
The group that would stay in the Alchemist's Lab helped the others to prepare to leave. Bandages were dolled out, armour was straightened (with minor repairs), and a light meal was consumed. All that remained was to choose an approach. It appeared that the Vault they sought had two possible approaches:
One directly east, though an eerily glowing (but otherwise dark) room. "I think they got a summoning circle in there" said the gnome Alchemist in warning, but he did not know what it summoned or if it was active.
The other was to the north. This meant back (for some) through the Scrying Room and the room with the red dragon skull. Then it was into a hallway lined with terracotta warriors. Everyone fully expected these to animate, with good reason: The Dracolich had been tapping in to elemental magic of the earthen variety. Why would he not protect his vault with elemental guardians?
Either way, it would not be safe or easy.