So right in time for Halloween, RPGPundit Presents #52: The Ladystone (https://www.drivethrurpg.com/product/257513/RPGPundit-Presents-52-The-Ladystone)presents you with a Medieval-Authentic supernatural adventure scenario. It's got a sinister stone in a bog, a demon, ancient curses, old northman magic, a legend about an elf-maid, two villages once friends but now on the verge of slaughtering each other, sinister magic, a weapon of Chaos, mysterious Cymri gypsies, and more.
(https://3.bp.blogspot.com/-M_WGSEDsvVs/W9jF44KkRkI/AAAAAAAADNA/l-9_qoYYidYqE1cyI9FoLi7gUsmUkJlrwCLcBGAs/s1600/52stone.jpg)
As always, the adventure-scenario is written up with Lion & Dragon (https://www.drivethrurpg.com/product/226022/Lion--Dragon) in mind, but is playable with ANY OSR system or any rules based on D&D.
You can pick up The Ladystone right now, for just $2.49 at DTRPG (https://www.drivethrurpg.com/product/257513/RPGPundit-Presents-52-The-Ladystone) or at the Precis Intermedia Webstore (http://www.pigames.net/store/product_info.php?products_id=973)!