From publisher blurb:
This first entry in the "Monster Menagerie: Seasonal Stars" line offering a template for single horror-themed concept, the pumpkin-headed horror that often inspires campfire tales and local legends. Appropriate as an ongoing threat separate from an adventure's main plot (and able to continue to be a threat even after PC's kill it the first time) or the climactic final battle in a long adventure exploring its region and dealing with the forces that called it into being, the pumpkin stalker template can be added to nearly any monster to form a custom creature sure to concern any band of adventurers. And for GMs who just need a ready-to-go villain to throw at players, we present the template pre-applied to an assassin vine (the CR 4 vine stalker), wyvern (the CR 8 pumpkin stinger), and a mohrg (the CR 11 death-o-lantern).