Embrace of the Twisting Nether

The Embrace of the Twisting Nether is the upgraded epic level breastplate that is craftable and wearable only by Blacksmiths with the Armorsmithing specialty.

Source
This item is crafted by Blacksmiths with a skill level of 375 who also have the Armorsmith specialty.

The plans can be learned from the Armorsmith trainers:
 * in Ironforge
 * in Orgrimmar
 * in Shattrath City