The DotMM Companion continues on to Level 15, the Obstacle Course—the most perfect level of Undermountain. Having been locked in a demiplane for three months by the Mad Mage, the party is offered to chance to save the city of Waterdeep from Mecha-Halaster!
This supplement includes:
DM Notes. Notes including but not limited to spicing up the dungeon crawl with valuable roleplay with select NPCs.
Mecha-Halaster's March. An optional, final battle with Mecha-Halaster, who has been loosed upon Waterdeep. If the adventurers survive the Obstacle Course, the Mad Mage promises to teleport them to the besieged walls of Waterdeep to square off against the steel monstrosity.
Areas of Note. Notes, room descriptions, scenes, and scripts for the various areas of the dungeon.
Magic Item Descriptions. Save yourself the time of digging through the Dungeon Master's Guide to determine how the few magic items on this floor work. The appendix also lists the area the item is found.
Monster Stats. Statistics are provided for all unique NPCs used on this level.
- from the publisher's blurb