Ragefire Chasm

Ragefire Chasm is an instance dungeon located in Orgrimmar. The entry portal is in the Cleft of Shadow, next to Neeru Fireblade's tent. The lava-filled chasm is home to many hostile troggs, and followers of the Burning Blade have also recently begun poking around the area.

History
Beneath the city of Orgrimmar lies this fiery chasm. Recently, a clan of troggs known as Ragefire Troggs have begun to appear in the chasm, from deep below the lava-filled tunnels. Magatha Grimtotem, of the tauren people, attempted to make peace with these creatures, but was met only with hostility. It was clear that these troggs were not interested in diplomacy, and could potentially overwhelm the entireHorde if left unchecked.

A sect of the mysterious Shadow Council has also taken refuge in this chasm. This sect is known as the Searing Blade, and is led by Taragaman the Hungerer, afelguard; Jergosh the Invoker, a powerful warlock; and Bazzalan, a satyr. From their dark hiding place, they plot to overthrow and destroy all that the Horde has built for themselves in these lands.

Official description
Ragefire Chasm consists of a network of volcanic caverns that lie below the orcs' new capital city of Orgrimmar. Recently, rumors have spread that a cult loyal to the demonic Shadow Council has taken up residence within the Chasm's fiery depths. This cult, known as the Burning Blade, threatens the very sovereignty of Durotar. Many believe that the orc Warchief, Thrall, is aware of the Blade's existence and has chosen not to destroy it in the hopes that its members might lead him straight to the Shadow Council. Either way, the dark powers emanating from Ragefire Chasm could undo all that the orcs have fought to attain.

The Warchief of the Horde, Garrosh Hellscream, believes that a swift and brutal strike at the cult's lieutenants might serve as Orgrimmar's best defense. If they're not silenced, the dark powers emanating from Ragefire Chasm could undo all that the orcs have fought to attain.[1]