100% Hit Chance
Brings on the armageddon, dealing 394 Mechanical damage to all enemy pets and instantly killing the caster.
Using armageddon will prevent the caster from activating Failsafe mechanisms.
Drop: Siegecrafter Blackfuse [??+]
Zone: Siege of Orgrimmar
Approximate Drop Rate: 1 in 125
Profession: Engineering 
Taught By: [Schematic: Chief Engineer Jard's Journal]