Blackrock clan The Blackrock clan led the charge during the First War and Second War . During that time period , it was one of the largest and most feared of the orc clans . During the Third War a faction of the clan tried to summon demons , while another group is still fighting the Alliance and is known as the Dark Horde . History . Pre Corruption . Blackhand was the Chieftain of the Blackrock Clan , but Gul ' dan needed a puppet to control the Horde so Blackhand became a mere figurehead for the warlock . First War . Near the end of the First War , Blackhand was challenged and killed by his lieutenant , Orgrim Doomhammer . Doomhammer seized control of the clan and slaughtered the members of the Shadow Council , the biggest threat to his throne . Second War . The clan ' s forces achieved a number of victories during the Second War , though the betrayal of Gul ' dan forced Doomhammer to divide his forces and send a part of the clan to hunt him down and slaughter his followers . The event weakened the Blackrocks , who were eventually defeated and nearly destroyed during the assault on Blackrock Spire , and Orgrim Doomhammer was himself captured and sent to Lordaeron in chains . The Blackrock clan did not disappear ; though ; the few remaining orcs who had not been captured or killed at the battle returned to Blackrock Spire and began to rebuild . Unlike the other orcs , they remained steadfast to the ideals of the old Horde , including demon worship and depraved blood lust . They became a beacon for orcs who longed for the old days , and soon enough their ranks began to swell again . Third War . In the intervening years between the Second War and Third War , the Blackrock clan became a major problem for the Alliance . A faction in Lordaeron under the leadership of Jubei ' thos re - embraced their demon - worshipping heritage , staged raids on a number of defenseless Alliance towns , and sacrificed their villagers to the Legion . They did this because their warlocks told them that demons would rain from the skies and the world would burn ( referring to the coming of the Burning Legion in the following months ) . They also ignored Thrall ' s call to return to shamanism . During the Third War , most of the Blackrock forces in Lordaeron were killed by Arthas and Kel ' Thuzad ' s Scourge . Jubei ' thos and his lieutenants had in their possession a demon gate which Kel ' Thuzad needed to communicate with Archimonde . The Blackrock orcs that Thrall didn ' t liberate from the humans ' internment camps were likely killed by the Scourge . However , other members joined the modern Horde under Thrall , like Eitrigg , and Varok Saurfang . Orgrim Doomhammer was a mentor to Thrall , and the orc capital of Orgrimmar was named after him . Regardless , the Blackrock orcs in the New Horde don ' t seem to have maintained a clan identity and are now simply Horde orcs . Aftermath of the Third War . Currently , the Blackrock clan still mainly resides in and around Blackrock Spire under the leadership of Rend Blackhand , where they war with the Dark Iron dwarves for control of the area . Their holdings also include territory in the Burning Steppes and the Redridge Mountains . They have formed the Dark Horde and have become a dire threat to nearby towns like Lakeshire , whose defenses are severely strained against their raids . It has also been rumored that they have allied with a group of black dragons led by Nefarian , Deathwing ' s son . They are but one of the pawns Nefarian is using to undermine the human kingdom of Stormwind . Cataclysm . During the " " , the Blackrock orcs have found a passage and invade Northshire Valley . It is revealed that the Blackrock clan have allied themselves with Deathwing and the Twilight ' s Hammer clan . Mists of Pandaria . In the " " , a large amount of Blackrock orcs have been granted to join the Horde at the request of Warchief Garrosh Hellscream . Led by Malkorok , hundreds of Blackrock orcs have been added into the elite Kor ' kron while those have become citizens . Serving as a secret police force , they would punish those that who would dare stand against the Warchief . However , not all of the Blackrocks have been supportive to their warchief , finding him brutal and corrupt to all other Horde races . Most of them , along with the Dragonmaw , Orgrimmar Grunt s , Durotar Orcs , and some of the Kor ' kron have sided with Darkspear rebels when Thrall secretly entered Orgrimmar and rallied all the orcish citizens loyal to the Horde . After the Siege of Orgrimmar ? During the Siege of Orgrimmar , their leader Malkorok was killed . It is unknown who will replace Malkorok as their chieftain , or if they ever will . It might be that Eitrigg , Varok Saurfang , or possibly Urukal would succeed Malkorok , as they are the only known living members having originated from that clan but are honorable enough to keep it under control . Either way , Thrall is believed to return as the racial leader of the orcs and Lord of the Clans , as he sought orcs in Orgrimmar who were against Garrosh ' s tyranny . No official Chieftain has been confirmed for the Blackrock Clan , post the Siege . Warlords of Draenor . In the alternate timeline of Draenor , the Blackrock clan serves within the Iron Horde and is led by Blackhand himself .