One Night at Castle Ghast

Concept: “...best be gone before the coming of the dawn, lest the castle disappear and drag them with it to the lands of the dead.” 
Content: A once in a lifetime castle-crawl.
Writing: A traditional ghost story, an inexorable timer, and the highest stakes.
Art/design: Dark, textured, and occasionally effervescent images of spectral manifestations.
Usability: To prolong the inevitable.