An overland adventure and dungeon set in the Arduin universe. Contained 8 new monsters, 8 new magic items, and several unique traps.
From the introduction:
"This module is designed to tie together the three previous modules plus add a new dungeon to the mythos. For this reason there are overland maps, and a large number of specific and random overland encounters. The map is so designed as to allow it to fit easily into anyone's world or to give those of you who desire it a new, playable world of your own (one of the so-called "middle kingdoms" or a part of one of them). It's entire up to you."