The mightiest monsters and foulest foes of nightmare and legend rampage into your Pathfinder Roleplaying Game campaign with Bestiary 4! This collection of creatures shatters all past thresholds of danger and destructiveness with phenomenally powerful beings like demon lords, kaiju, juggernauts, and Great Old Ones ― including invincible Cthulhu! Terrors like nosferatu vampires, clockwork dragons, twisted fleshwarps, and sadistic tooth fairies number among the more than 250 monsters collected to challenge heroes of every level of play ― from first-level novices to mythic champions. New familiars, player-friendly races, and other allies also rise to aid characters in combating this host of horrors, while new templates ― like mummified and fungal creatures ― breathe fearsome new menace into your existing monstrous arsenal. Strike fear in the hearts of the mightiest heroes and shake the foundations of your campaign with Pathfinder Roleplaying Game: Bestiary 4.