Old-School Essentials: The Halls of the Blood King

With the rising of the Blood Moon, the accursed abode of the Blood King returns to this world. The lord of all vampires comes to claim the blood that is owed to him. His halls contain treasures and secrets that would make any ambitious adventurer abandon reason and caution to seek them out. Will you risk your soul for gold and glory in the Halls of the Blood King? A fantasy horror adventure for characters of 3rd to 5th level.