The Lighthouse's Curse is an One-Page adventure compatible with Old School Essentials and easily adaptable to any OSR system.

The action takes place in an abandoned lighthouse, where on evil shattered crystal spread its power and transformed teh occupants into undead creatures.

Along with the adventure two new monsters are presented and will challange the boldness of the adventurers.    

https://giallogames.itch.io/gp1-the-lighthouses-curse