Frozen Heart CR 15
NE haunt (30-ft.-by-30-ft. cavern)
Caster Level 15th; Notice Perception DC 30 (to feel icy, grasping fingers)
hp 67; Weakness fire spells and effects (these effects damage the haunt); Trigger proximity; Reset 1 hour; Effect All creatures in the area take 5d6 points of cold damage and 1d6 points of Dexterity damage per round from the grasping hands of spectral creatures. A successful DC 23 Fortitude save each round negates the Dexterity damage but not the cold damage. Any creature that doesn’t move on its turn becomes encased in a sheath of ice equivalent to wall of ice, is helpless, and can’t breathe.
Icy Grave Haunt (CR 15): The calculated evil has infected the ice of his domain, which attempts to grasp and freeze any being that dares to walk through the haunt’s halls.
Pathfinder Adventure Path #137: The City Outside of Time © 2018, Paizo Inc.; Authors: Amanda Hamon Kunz, with John Compton, Gregory Hanigan, and Mikko Kallio.