From Pathfinder Lost Omens The Grand Bazaar, which isn't enabled.

Avalanche of Stones Snare

ITEM 18

UNCOMMON CONSUMABLE MECHANICAL SNARE TRAP

Price 3750 gp

Usage held in 1 hand

Bulk —

Category snare

When a creature enters the snare's square, the snare releases countless stones to batter the creature, dealing 22d8 bludgeoning damage (DC 40 basic Reflex).

Pathfinder Lost Omens The Grand BazaarOGL