Heartsblood

Description
"Sobbing wildly, Yasmina plucked a jeweled dagger from her girdle and plunged it to the hilt in his breast. He stiffened and then went limp, a grim smile curving his dead lips. Yasmina hurled herself face-down on the rush-covered floor, beating the reeds with her clenched hands. Outside, the gongs and conchs brayed and thundered, and the priests gashed themselves with copper knives."

- The People of the Black Circle

The peshkabz of Vendhya are designed to pierce armor, passing through layers of steel to strike at the flesh beneath. This matched pair is whispered to have been used to murder kings, and that the stain on the blade from the royal blood can never be removed.

Using these in battle will give increased armor penetration.

Source
The  can be found in Legendary Chests.

Repair
This item can be repaired with a.