The Shade Isle Campaign
At the eastern edge of the Merkbog, not far from the foothills there, there is a clearing around an old, dead, hollow tree. Set within this clearing is a great stone table, upon which sits a rotting feast. Pale, corpse-like men, entranced, pick at the rotting food but do not eat. They are the thralls of a coven of three harpies which live in the tree nearby.
When the adventuring company came upon this place and slew the last of the harpies, thus ending their siren-song, the men sitting at the table died in that instant.