The Miser's Tomb (2006)

From the introduction:

In ages past, a green dragon known simply as the Miser collected an enormous number of treasures. Unlike many other dragons of Eberron, he gleefully meddled in the affairs of mortals. He hired thieves, assassins, and mages to secure the items he craved. Always paranoid, he secreted his treasures across the land. With his peerless memory and boundless resources, he built devilish traps and impenetrable hiding places for the gold, gems, and magical items that he so craved. The Miser turned his lair into a small fortress where he secured his most precious treasures.

In the end, the Miser's paranoia proved unable to save him. He was afflicted with a terrible curse that slowly killed him. Unfortunately for his enemies, the Miser arose as a ghost shortly after death. Since then, the Miser has been content to remain among his great treasures. Still, now and again he hires adventurers to steal items he covets. In return, he offers treasure maps to the many treasure caches he built up in life.

This adventure, an entry round of the 2006 D&D OPEN CHAMPIONSHIP, concerns the final destruction of the Miser. A powerful artifact, the Heart of Reason, lies within the Miser's clutches. Legend holds that the Heart carries tremendous power and unmatched doom.
...
Seemingly endless stairs wind down, down, and down into the earth. After nearly an hour of decent, you have finally come to the bottom. A passageway stretches forth from the foot of the stairs. After about 40 feet, the passage takes a sharp turn to the east. A soft radiance spills out from around the corner and a single bat flutters erratically toward the light.

User summary:

The Miser's Tomb is provided as a 15-page PDF scenario and a 2-page DOC errata; with an additional 4-page DOC handout (print-and-play) and a 2-page DOC handout (print-and-play).