The Duergar Mindforge

From publisher blurb: A 7TH-LEVEL FIFTH EDITION ADVENTURE The Duergar Mindforge is a Fifth Edition adventure for three to five characters of 6th to 8th level and optimized for four characters with an average party level (APL) of 7. A mercenary band of dark dwarves has discovered an ancient forge thought lost to time. Their psionic master has corrupted it and is creating weapons for the forces of Deepshade to rise again. This adventure takes place in the Freelands campaign setting but fits into any existing campaign with only a few modifications and name changes.