Wind-Reaver's Dagger of Quick Strikes

Source
Wind-Reaver's Dagger of Quick Strikes can be found at, at the Terrace of Gurthan in the area where Karr the Darkener spawns in the Dread Wastes and is one of the treasures of Pandaria.

It is likely a weapon that belonged to Kil'ruk the Wind-Reaver.