GURPS Spirits Vaesen Setting but there's also a companion

but there's also a companion guide to use it with Frontier Scum

Tome of Beasts 3 has what you’re looking for

the undead strive for influence that their peers can only envy

pulp heroes

Any one of them can be prepped and run on short notice

GURPS Spirits Vaesen Setting but there's also a companionThe creatures of the Other World are all around us. Some were once alive. Some were created by human imagination. And some are completely inhuman but thirst for our souls. GURPS Spirits is a complete guide to the spirit realm and its inhabitants. It includes a catalog of spirits from around the world: angels, demons, djinn, dryads, ghosts, loas, manitou, raksasha, and many, many more. It is also a campaign guide for characters who see spirits, serve