Concept: “The pig must be alive while the spell is cast. The pig explodes after the spell is cast.”
Content: A scroll that summons darkness and feral pigs
Writing: Mostly descriptive with a few mechanical components
Art/design: Typography and layout differentiate sequential elements; also includes a piggy
Usability: Intuitive, with some potentially entertaining applications

Concept: “What happens when the lore of our world collides with the Dying World of MÖRK BORG?”
Content: The second volume of collected FÖLK-LORE Jam entries
Writing: Varies by author, see individual entries under the FÖLK-LORE Jam tag
Art/design: Varies by entry; single-page entries are well balanced in spreads
Usability: Varies by entry, but it’s all Mörk Borg—how tough could it be?

Concept: “The faces of Bélmez function as a hostile encounter with random characteristics.”
Content: d8 faces appear on walls and do d20 awful things to PCs
Writing: Includes descriptions of behavior and adapting the faces to different materials
Art/design: The background is staring at you
Usability: Has more special abilities than most encounters, but all are fairly simple and manageable