I simply love dungeons, handled correctly they are better than the Fruit Flavoured God of Awesomeness!
The heroes storm the Temple of R’gu, the God From The Stars, to steal the Ruby of the Winged Master
The Great King long ago ceased attempting to police the wastelands of his Border Marches, and these debatable lands fell into the hands of petty counts, retired generals, and warlords, who constructed and then abandoned many keeps ripe for plunder.
The Repository of the victorious dead…
The PCs find a small green glass bottle, something can be seen writhing within the smoked glass. If the PCs open the bottle a repulsing form of life will pour forth and grow in size. A genderless beings of soft pliable purple flesh towers before the PCs, it has no detail, no distinguishing characteristics except for a narrow slit for a mouth that holds rows of inwardly curving teeth.