- 4 Ice Trolls
- 1 Ice Troll Berserker
- 1 Ice Troll High Priest
- 4 Ice Troll Trappers
- 1 Ice Troll Warlord
- 3 Murloc Nightcrawlers
- 6 Red Dragon Whelps
- 2 Red Dragons
The Lich Kel'Thuzad needed a Demon Gate to communicate with the Demon Lord Archimonde and receive his instructions. However the nearest functional Demon Gate was guarded by the Blackrock clan, so they would have to destroy the Orcs first.
The Orc warlocks thought that the Burning Legion has sent the undead to test them. They felt that the undead were "impure" that the Orcs were the true servants of the Legion. Kel'Thuzad coldly informed the delusional Orcs that they had failed to conquer Azeroth and they didn't hold any favor with the Legion. The Orcs too must be scourged from the world.
The Blackrock Orcs fought hard, along with their ogre and troll allies, and goblin and dragon slaves. However, the Scourge's numerous undead warriors, now reinforced by the powerful Frost Wyrms, quickly overwhelmed the Orcs. Arthas and Kel'Thuzad destroyed each Orc village one by one, killing the individual leaders and learning Demon Lore from their Magic Tomes. Finally, all the Orcs lay dead before them. Kel'Thuzad approached the Demon Gate and requested to speak with Lord Archimonde.
Archimonde appeared within the Demon Gate and ordered the undead leaders to steal the Book of Medivh from the Violet Citadel of Dalaran. At twilight, three days from now, they were to summon Archimonde into the world of Azeroth.
- Unlike the Far Seers of the new Horde, Throk'Feroth and Mazrigos use "demonic" or "dark" powers due their affiliation with the Blackrock Clan.
- The Blackrock orcs control Red Dragons despite Alexstrasza's release many years prior. This is explained in Lands of Conflict where it is revealed that the Dragonmaw clan, members of the Dark Horde and allies of the Blackrock Clan, have managed to enslave a small number of the red dragonflight via demonic magic. ( )
- The Blackrock orcs train orc warlocks instead of shamans, a clear indication of their continued allegiance to the Burning Legion.