From Pathfinder Adventures: Troubles in Grayce, which isn't enabled.

Guardian Rose

ITEM 4

UNCOMMON CONSUMABLE HEALING MAGICAL TALISMAN

Price 20 gp

Usage affixed to armor

Bulk —

Category talisman

Activate (concentrate)

Trigger You would be reduced to 0 Hit Points but not immediately killed.

This rose-shaped crystal brooch is a translucent bloodred. These talismans have saved the lives of many a soldier on the field of battle. When you activate a guardian rose, you avoid being knocked out and regain 2d8+5 healing Hit Points. However, this puts a strain on your body and you are Enfeebled 1 until the end of your next turn.

Pathfinder Adventures: Troubles in GrayceORC