Gallowag Prowlers

Concept: “They blend into the muck, crawl along walls and quietly stalk unsuspecting PCs.”
Content: A stealthy ambush enemy
Writing: Some brief lore and a simple stat block with a sneak attack special ability; also includes lair and loot
Art/design: Minimal text arranged on a detailed and characterful illustration
Usability: Simple and straightforward to use but with potential to add some extra color to a particularly slimy, nasty dungeon