Gain the effect of a random passive skill of your class type.
One of 3 Magic Properties (varies)
+3 Random Magic Properties
As of Patch 2.2.3 (August 24th, 2015) the following changes were made to this item:
The Hellfire Amulet is truly a badge of dedication to those who, at great cost to themselves, have sworn their lives to eradicating the demon scourge from the lands of Sanctuary.