Sulfuron

In Warcraft Lore, the word "Sulfuron" refers to more than one thing.
 * Sulfuron Hammer - An epic weapon, needed for the legendary weapon Sulfuras, Hand of Ragnaros.
 * Sulfuron Harbinger - A boss in the Molten Core.
 * Sulfuron Ingot - A reagent needed to forge the aforementioned Sulfuron Hammer.
 * Sulfuron Keep - Ragnaros' stronghold in the Firelands, in the Elemental Plane.
 * Sulfuron Spire - Ragnaros' stronghold in Mount Hyjal.