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From Pathfinder Season of Ghosts Hardcover Compilation, which isn't enabled.

Taljjae Tassel

ITEM 10
Price 160 gp
Usage affixed to weapon
Bulk —
Category talisman

Activate (concentrate)
Trigger Your Strike with the affixed weapon was a critical success.

The bright red tassels of the creature known as Taljjae are a ubiquitous motif in Hwanggot and are used as charms to pray for good fortune and reward for great effort. They adorn clothing, weapons, and even drinking gourds. These particular tassels carry within them a potent fraction of the mysterious fey's power. When you activate a Taljjae tassel, your weapon gains the properties of the Grievous rune for the duration of the triggering attack.

Pathfinder Season of Ghosts Hardcover CompilationORC