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From Pathfinder Society Scenario #6-05: Silver Bark, Golden Blades, which isn't enabled.

Sakura's Sprig

ITEM 5
RARECONSUMABLEMAGICALTALISMAN
Usage affixed to weapon
Bulk —
Activate (concentrate)
Trigger You strike an unholy target with the affixed weapon
Requirements You're trained in the affixed weapon.

This small glowing sprig of cherry tree flowers is only granted by Sakura, the kami of Silvertree. When activated, the affixed weapon gains the holy trait for the triggering attack and all other attacks for 1 minute.

Effect: Sakura's Sprig

Pathfinder Society Scenario #6-05: Silver Bark, Golden BladesORC