From Pathfinder #170: Spoken on the Song Wind, which isn't enabled.

Serpent Ward

HAZARD 7

Stealth +15 (expert)

Description Illusionary snakes erupt from the trapped door, inflicting a venomous curse on intruders.

Disable DC 26 Thievery (expert) or DC 24 Occultism (expert) to deactivate the magical trigger

Curse the Intruders (curse, illusion, occult)

Trigger The trapped door is opened other than by a serpentfolk

Effect Hissing, illusionary snakes leap from the door. Each living creature within 30 feet is subjected to the curse of potent poison. If a living creature opened the door, that creature must roll its saving throw against the curse twice and take the worse result (this is a misfortune effect).

Curse of Potent Poison (uncommon, curse, magical) CURSE 5

This curse magically speeds poison through your body.

Saving Throw DC 20 Will

Effect You take a -1 status penalty to Fortitude saves and you gain weakness 3 to poison (if you already have weakness to poison, increase it by 3). The curse remains until removed by Cleanse Affliction or similar magic.

Effect: Curse of Potent Poison

Pathfinder #170: Spoken on the Song WindOGL