Hellfire Citadel is the headquarters of the Fel Orcs of Outland; it's an impenetrable bastion that once served as the base of operations for the orcs throughout the First and Second Wars. Kargath Bladefist and his Fel orcs now make their home in the citadel.

The Shattered Halls is a level 70 instance in Hellfire Peninsula commonly referred to as "SH," serving as the third wing of Hellfire Citadel, with Kargath Bladefist as the final boss. Although it originally required a specific key just to open up normal modes, it has been removed along with other keys in patch 4.2.