Sulfuron Keep

RPG description
In the center of a vast lake of fire in the Elemental Plane stands Sulfuron Keep, the home of Ragnaros the Firelord. Until comparatively recently, he ruled his underground land with an iron fist. Three hundred years ago, he was summoned to fight in the dwarven civil war known as the War of the Three Hammers. This reckless act sundered the Redridge Mountains and created Blackrock Spire. Now, in a greatly weakened state, he lies at the bottom of that volcano on Azeroth, striving to find a way home. Meanwhile, in Sulfuron Keep and elsewhere across the Firelands, his elemental princes battle constantly for dominance.

After the defeat of Ragnaros in Molten Core, the Firelord retreated into the Firelands, where he planned his return on Azeroth. After being again sent back into the Firelands again by Cenarius, Ragnaros will be fought here.

In Cataclysm
A location known as Sulfuron Spire has been erected in Mount Hyjal. It will be a portal between Firelands and Azeroth. This may be part of the keep. Artwork of the keep appears identical to it.

Sulfuron Keep proper is a location the the Firelands raid.