From Pathfinder Guns & Gears, which isn't enabled.

Tin Cobra

ITEM 5

UNCOMMON CLOCKWORK CONSUMABLE MECHANICAL POISON SNARE TRAP

Price 23 gp

Usage held in 1 hand

Bulk —

Category snare

This clockwork cobra activates when a creature enters its square, at which point it lashes out and spits venom, dealing 3d6 poison damage. The target must attempt a DC 21 Fortitude save.

Critical Success The creature is unaffected.

Success The creature takes half damage.

Failure The creature takes full damage and is Sickened 1.

Critical Failure The creature takes double damage is Sickened 2.

Pathfinder Guns & GearsORC