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

No Light Shall Guide Thee

HAZARD 9

Stealth +20 (master)

Description The evercursed crystals suddenly extinguish if they are disturbed, taking the PCs' sight away with their failing light.

Disable DC 30 Thievery (master) to subtly sift the ashes aside in a way where the curse simply fades without discerning a target or DC 33 Occultism (expert) to know how to harmlessly disperse the malign magic

Devour Sight (curse, incapacitation, visual)

Trigger A creature disturbs the ashes in the fireplace or attempts to manipulate any of the evercursed crystals

Effect The crystals burn out, becoming non-magical stones, and the triggering creature must attempt a DC 32 Fortitude save.

Critical Success The creature is unaffected.

Success The creature's vision blurs and dims, and they become Dazzled for 24 hours.

Failure As success, but with an unlimited duration.

Critical Failure The creature is Blinded with an unlimited duration.

Pathfinder Adventure Path: Bastion of BlasphemiesORC