The Temple of Eternally Lost Souls

From the description:

You come across a vast and labyrinthine ancient ruin. It must have been a grand place of worship once, but now it is reduced to an empty, rotting shell, putrid with the stench of decay. Yet, the gaping maw of its entrance strangely lures you in... What treasure might still be found here?

This is a D66 list of random interesting, useful and downright dangerous items. The selection is loosely based on the darkest corners of a certain Swedish furniture store.