The area of the Blackrock Spire instance to the south of the Hall of Blackhand is commonly known as Lower Blackrock Spire. Though it is often treated as an independent instanced dungeon from Upper Blackrock Spire, it is in fact part of the same, huge instance. Before Patch 4.0.3a The Lower Blackrock Spire distinguished itself from Upper Blackrock Spire because it was designed for a 5-player party; Upper Blackrock Spire is now also a 5-player dungeon.
The majority of Rend's Dark Horde reside in Lower Blackrock Spire, making the city a sort of sprawling barracks. Only the elite members of the Dark Horde are allowed to live in the upper reaches of the city. Overlord Wyrmthalak acts as the ruler and taskmaster of these soldiers.
The orcs of the Blackrock Clan dominate most of the ruins of Lower Blackrock Spire, though they are divided up into various legions. These include the Scarshield Legion, the Bloodaxe Legion, and the Firebrand Legion. The elite Blackhand Legion resides in Upper Blackrock Spire. The orcs share the city with a contingent of Spirestoneogres and Smolderthorntrolls, who are also members of Rend's Dark Horde. The ruins are also home to a host of Spire Spiders who have infested a ruined corner of the city.
Scarshield Spellbinder: Counterspell, Resist Fire (Increases' target allies fire resistance by 83 for 1hr (buff).), Mana Burn, Arcane Bolt (1 sec cast, direct Arcane damage spell.)
Firebrand Grunt: Mark of Flames (1.5 secs cast, Increases fire damage dealt to target by 1000, 2 min duration.), Enrage ( Increases attack power and attack speed of an ally, 15 secs duration.), Mortal Strike
Firebrand Invoker: Mark of Flames (1.5 secs cast, Increases fire damage dealt to target by 1000, 2 min duration.), Fire Nova (2 secs cast, AoE fire damage spell), Flamestrike, Fireball)
Firebrand Darkweaver: Mark of Flames (1.5 secs cast, Increases fire damage dealt to target by 1000, 2 min duration), Curse of the Firebrand (1.5 secs cast, 657-843 damage per min for 5 mins.), Shadow Bolt, Shadow Bolt Volley (AoE Shadow Bolts), Dispel Magic
Firebrand Legionnaire: Mark of Flames (1.5 secs cast, Increases fire damage dealt to target by 1000, Improved Blocking, Shield Bash
Firebrand Dreadweaver: Mark of Flames (1.5 secs cast, Increases fire damage dealt to target by 1000, 2 min duration), Curse of the Firebrand (1.5 secs cast, 657-843 damage per min for 5 mins.), Plague Cloud (-57 strength, agility and stamina), Remove Curse
Firebrand Pyromancer: Flame Shock, Mark of Flames (1.5 secs cast, Increases fire damage dealt to target by 1000, 2 min duration)
Smolderthorn Witchdoctor: Elemental Protection Totem (Provides elemental resistance.), Superior Healing Ward, Flame Buffet Totem (Casts Flame Buffet(initial fire damage and increases fire damage dealt to the target.))
Smoulderthorn Headhunter: Pierce Armor (50% reduction to the enemy's armor.), Impale (Physical damage plus periodic damage every 2 sec for 10 sec. Stacks), Throw
[58D] The Final Tablets Given by Prospector Ironboot in Steamwheedle Port in Tanaris, this quest is in the middle of a long quest chain between the Sunken Temple and Zul'Gurub