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

Poisoned Skull

HAZARD 8

Stealth +18 (expert)

Description A fast-acting toxin that's almost invisible to the eye coats the first and seventh skull on this display shelf.

Disable DC 31 Thievery to identify the toxin and delicately wipe it free before burning the tainted cloth; on a critical success, the character can pinpoint two areas where the skull can be safely carried and, perhaps, used as an improvised thrown weapon to poison a creature.

Stain and Pain

Trigger A creature comes in contact with the skull

Effect The contact poison turns the exposed flesh a deep scarlet color that persists for 24 hours and also afflicts the creature with nettleweed residue.

Saving Throw DC 27 Fortitude

Onset 1 minute

Maximum Duration 6 minutes

Stage 1 3d6 poison damage (1 minute)

Stage 2 4d6 poison damage (1 minute)

Stage 3 6d6 poison damage (1 minute)

Pathfinder Adventure Path: Bastion of BlasphemiesORC