Author's blurb: This is the 39h in an ongoing series aimed to provide the overworked DM with ready-to run encounters. The adventurers find the ruins of a wizard’s ancient dungeon and face the buzzing horror of the Sanguinem Volant. The companion ZIP file contains JPEG versions of the maps (with and without grid), a Hero Lab file, the Word file of the encounter, and a PDF with character sheets for all the monsters.