From Pathfinder #210: Whispers in the Dirt, which isn't enabled.

Spear Jaw Trap

HAZARD 10

Stealth +22 (expert)

Description Motion-sensitive fungus tendrils cause spears to shoot out of the floor and ceiling, almost like teeth.

Disable DC 30 Thievery (expert) on the spear panels from any adjacent space, or DC 32 Nature (master) to slowly scrape away the motion-sensitive tendrils without triggering the trap

AC 28; Fort +22, Ref +16

Hardness 18, HP 70 (BT 35); Immunities critical hits, precision

Spear Jaws

Trigger A Small or larger creature enters the square marked with an S

Effect Dozens of iron spears shoot from the floor and ceiling, impaling anyone in the space. The trap deals 8d8+16 piercing damage (DC 30 basic Reflex save). Those that fail this save are also Immobilized until the start of their next turn when the spears retract.

Reset The trap resets in 1 round after a creature leaves its space.

Pathfinder #210: Whispers in the DirtORC