From Pathfinder Lost Omens Cheliax, Infernal Inheritance, which isn't enabled.

Savor the Hunt

FEAT 1

Activity reaction

Frequency once per hour

Trigger You cause a creature you can see to become frightened.

Watching horror take hold of your victims is a delicious sustenance to you. You gain temporary Hit Points equal to half your level rounded up, which last until the start of your next turn.

Pathfinder Lost Omens Cheliax, Infernal InheritanceORC