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From Pathfinder Adventure: The Slithering, which isn't enabled.

Gluttonous Spear

ITEM 6
UNCOMMONMAGICALMONKTHROWN-20
Price 250 gp
Usage held in 1 hand
Bulk 1
Category simple
Group spear
Damage 1d6 piercing

The head of this +1 striking Returning spear is wrapped in greasy hide, and its head resembles a thick, clawed finger.

On a critical hit, the target is Enfeebled 1 for 1 minute, and you gain 1d8 temporary Hit Points that last for 1 minute.

Pathfinder Adventure: The SlitheringOGL