From Pathfinder Adventure Path: Bastion of Blasphemies, which isn't enabled.

Agonizing Thorns

HAZARD 7

Stealth +17 (expert)

Description A massive tangle of brambles weaves through a skeleton clad in armor.

Disable DC 27 Survival to delicately unthread the vines from the skeleton without triggering them; four successes are required to disable the haunt.

AC 25; Fort +12, Ref +18

Hardness 15, HP 60 (BT 30); Immunities critical hits, precision; Weaknesses fire 5

The Thorns Need Blood (occult)

Trigger A person attempts to damage the vines or to Interact with the skeleton or its armor

Effect The thorny vines suddenly animate, and in so doing, make it appear that the skeleton is rising to attack. The vines lash out, and all creatures in area B2b or within 20 feet above take 8d6 slashing damage from the thorns (DC 29 basic Reflex save). A creature that fails the save also takes 1d6 persistent bleed damage (2d6 persistent bleed damage on a critical failure).

Pathfinder Adventure Path: Bastion of BlasphemiesORC