Plans: Thorium Helm

==Source==
This item is a world drop from levels 55-60 creatures on Azeroth, as well as chests: Mostly Solid Chests, but also others (including Fel Iron Chests in Hellfire Peninsula).
==Notes==
Since Patch 3.1.0, this recipe is also taught by blacksmithing trainers.
==External links==
Thorium Helm