from the cover:
The grey halls are a famous ruined base from the Age of Necromancy when all lived in terror of the undead hordes.
Today the Grey Halls are just ruins. Don't make the mistake of thinking they are empty. All manner of foul beasts, bandit gangs, rogue wizards and other terrors have occupied the halls.
An adventure location with random generation. The scenario notes are system neutral.
The PDF is designed to be printed and folded as a pocketmod.