From publisher blurb: Four Horsemen Present: Gruesome Oozes! In conjunction with d20PFSRD and Rogue Genius Games, the Four Horsemen have developed some slimy scares perfect for proving not everything shiny is treasure! Run, don't walk, to pick up this volume which offers the otherworldly Intruder (which unmakes reality in its wake), the self-aware Emulation (hollowing out its victims from within), the multiplying Exponential (which constantly divides, and conquers), and the mythic threat of the Hive Mind (which seeks to protect its collective consciousness)!