Malefic Core

Malefic Core is a item that is used to empower Ashjra'kamas, Shroud of Resolve.

Source
This item can be obtained by:


 * Completing all four objective areas and the boss in a Horrific Vision.
 * Defeating N'Zoth the Corruptor in Ny'alotha, the Waking City on Normal (or higher) difficulty.
 * Purchasing from MOTHER in the Chamber of Heart for.