Cube of Darkness

 is a arcane item in Total War: Warhammer II.

Description
This small black cube contains millions of tiny pin-pricks of light circling around a sphere of pure darkness.

Effects

 * Type: Hex of the Winds
 * Duration: 18 Seconds
 * Target: Enemy, 100m
 * Cooldown: 60 Seconds
 * Reduced power recharge rate

Source
https://twwstats.com/abilities?q=Cube%20of%20D&right=2049963969484436867