Precarious Bone Pile
HAZARD 3 +13 (trained)
This ancient pile of bones appears stable, but the slightest disturbance topples them.
DC 20 Acrobatics (trained) or DC 20 Stealth (trained) to shimmy past the bones without disturbing them, or deal any amount of damage to trigger the collapse from a distance
AC 10
HP 10 (BT 5)
Collapse
A creature moves through the treacherous squares near the bone pile or damages the bones piled in one of the squares
The bone pile collapses in a torrent of skeletal remains, spreading 5 feet in every direction from the bone pile's current area. This deals 6d4+9 bludgeoning damage to each creature within 5 feet of the bone pile (DC 20 basic Reflex). The area becomes difficult terrain.
Pathfinder #181: Zombie FeastOGL