Hood of Hungering Darkness

Hood of Hungering Darkness is a cosmetic helm.

Source
This item is available for purchase from the shop for $15 or €15. It was released on July 17, 2013.

With the See You Later Bundle on December 20, 2019, this helm was available at a discounted price with other items. On January 19, 2019, the helm is no longer available for purchase as it entered hibernation in the Blizzard Archive.

Blizzard Shop
''Forged from Fel Iron and shrouded in flames, the Hood of Hungering Darkness is a remnant of a rare dark magic only practiced by the warlocks of the Shadow Council. The lingering curse that keeps this headpiece burning is thought to be harmless, but feign demonic possession once you adorn it and see who dares to believe otherwise.
 * Is it Hallow's End yet?