Dungeons of the Dread Wyrm

From the introduction:

Rumors hint that below a barren crag in a forlorn range of hills lies the lair of the great dread wyrm, Felmurnuzza. This dragon has mercilessly tormented, terrorized, and plundered the nearby civilized lands for hundreds of years. However, no one has seen her for many decades. Nonetheless, these kingdoms continue to pay the fell serpent tribute out of fear. Many now say that she sleeps that sleep of death — her legendary fabulous hoard unprotected and ripe for the taking. Of course, if the rumors of her death are not true, a grim death surely awaits those that seek to discover her treasures.