Witchaven/Level 13

One of the more annoying levels in the game as large sections of it are nondescript maze set with spike traps, so don't be ashamed to use the automap. First, head for the pentagram area. Use the pull chain on the outer rim of the area before you drop in after the pentagram, to make sure you don't get stuck down there.

From there, you can head to the east side to find the exit inside the maze. The keys are optional.

Bonus areas

 * Immediately to the left of the starting area, you'll find a chamber containing an Ankh and an Onyx Ring.
 * The big chapel of gore in the center north contains a broad sword.