From Pathfinder Adventure Path: Hellbreakers, which isn't enabled.

Impelling Symbol

ITEM 8

Price 75 gp

Usage applied to armor

Bulk —

Activate (concentrate)

Trigger You Cast a Spell that restores Hit Points to another creature.

This simple religious symbol bolsters you when you help others. When you activate it, you gain a number of temporary Hit Points equal to your level plus the rank of the spell you cast. These temporary Hit Points last for 1 minute.

Effect: Impelling Symbol

Pathfinder Adventure Path: HellbreakersORC