Miscellaneous: Shadowknight Test of Disempowerment piece not dropping

[uygi]

EDIT: Confirm this is now dropping... clear #17 gave one Blood Sky Emerald, although drop rate still seems excessively low.

Blood Sky Emerald should be dropping from Spiroc Expulser, Spiroc Revolter, Spiroc Walker, & The Spiroc Guardian, but doesn't.

Per magelo (admittedly current info, but all I could find and looks realistic), drop rate should be between 10-20% from both Revolters and Banishers. In the at least 16 isle 5 clears total that I can get info about, neither DA nor VD have gotten a single Blood Sky Emerald.

Can anyone verify that this item does drop? Cannot verify if this quest has been completed on server or not.