Varimathras is likely second in command of The Forsaken. He is a Dreadlord, a race of demons from The Twisting Nether used as commanders for the invasions of the Burning Legion. With the fall of the Legion at the Battle of Mt. Hyjal, he and several of his brothers were abandoned in the Plaguelands at the Ruins of Lordaeron. They had no news of the defeat of the Legion, and continued to rule over the undead stationed there while waiting for further instructions from Archimonde the Defiler. Their fortifications were assaulted during the Undead Civil War by the forces of the Forsaken and their leader Sylvanas Windrunner, and Varimathras was captured by the Dark Lady. Out of cowardice, he swore fealty to her in order to preserve his own life and assisted her in the destruction of the Dreadlords Balnazzar and Detheroc. He personally attacked and was forced to have killed his brother Balnazzar, leader of the Plaguelands’ Legion forces. Since then he has assisted Sylvanas in her rise to power as ruler of the Forsaken, and aids with her from the Undercity. He runs the day to day affairs of the undead faction, monitoring the progress of the Forsaken’s war against the Scourge and the Scarlet Crusade. His position is highly special as he is the only former member of the Burning legion who openly became one of the rulers of the Azeroth faction (Horde). Although he is a powerful leader of the Forsaken, he does not give honor when killed.

Appears in Warcraft III: The Frozen Throne
Appears in World of Warcraft

Sargeras, a bronze-skinned Vanir Titan, used to be the champion of the Pantheon. Once he was sent to deal with several demonic races. He managed to defeat them and imprison them. But due to the corruption of these demons, he went insane. He released the demons from their prisons, who were quick to ally with the Dark Titan, bowing before his vast power.

Sargeras began invading worlds, becoming the leader and creator of the Burning Legion. His mortal avatar appeared before, and was killed by, the Guardian Aegwynn, but not before possessing her son Medivh. His spirit lay dormant within the young man for many years, corrupting him with subtle manipulations that culminated in the opening of the Dark Portal which brought the Orcs into Azeroth.

Eventually, Medivh was killed and Sargeras’ spirit was exorcised by the mage Khadgar, the Knight Anduin Lothar (trainer of Uther the Lightbringer, founder of the Paladins of the Silver Hand) and the half-Orc Garona. What is left of the Dark Titan is currently in the Twisting Nether, completely incapable of doing anything, due to his lack of a physical form. If he were able to once more make himself physically manifest, he would arguably be the most powerful being in the Warcraft universe.

Appears in the novelization Warcraft: The Last Guardian.
Appears in the novelization Warcraft: War of the Ancients trilogy
Appears in Warcraft III: The Frozen Throne

Known as the Deceiver, second in power only to Sargeras himself, he and Archimonde were singled out by Sargeras as his generals for his Burning Legion. Kil’Jaeden is the leader of the Nathrizim, also known as Dreadlords. It is Kil’Jaeden who creates the Lich King by forming a dark pact with the Orc Warlock Ner’zhul and it is Kil’Jaeden who later appoints Illidan Stormrage the task of destroying the Lich King. An immensely powerful Eredar Warlock, Kil’Jaeden is responsible for commanding the Burning Legion from the Twisting Nether. While Archimonde is the leader of the invasion of the Burning Legion, It is believed that Kil’Jaeden is in fact more powerful than Archimonde and is second in power only to Sargeras himself. He is currently the master of Illidan Stormrage and after his initial appearance at Outland to confront his wayward pawn, his whereabouts are unknown.

Appears in Warcraft III: The Frozen Throne
Appears in the novel World of Warcraft: Rise of the Horde

An Orc veteran, sent by Warchief Thrall to investigate a strange vision by a shaman. Broxigar ended up being sent back in time along with the human wizard Rhonin and dragon-mage Krasus to fight the first war against the Burning Legion.

During the final battle against the Legion, he jumped into the vortex to the Twisting Nether and held off the demons long enough for Rhonin and Krasus to collapse the portal. He was killed by Sargeras himself after managing to wound the titan with the axe given to him by Cenarius. Krasus returned the axe to Thrall and told the Warchief of Broxigar’s heroic death.

It should also be noted that Mannoroth took great interest in the Orc, seeing potential in him, most likely leading the Pit Lord to seek out the world that had more of them (although why it took him thousands of years to find it is as yet unexplained). Currently Broxigar’s brother the High Warlord Saurfang wields his mighty axe.

Appears in Warcraft: War of the Ancients Trilogy

Before and during the first coming of the burning legion, Azshara was queen of the Night elves. When Lord Xavius and several Highbourne magi opened a portal to the Twisting Nether, she became partially entranced and attempted to help bring Sargeras and the Burning Legion to Kalimdor, which is what the one continent was called at that time. (In Richard A. Knaak’s “War of the Ancients”, the hero Wizard Rhonin and the dragon mage Korialstrasz [also known as Krasus, when in his human form] are transported back in time, where they affect history.) When the City of Zin-Azshari sank in the Sundering, Azshara was contacted by the Old Gods, who then transformed her, and her most trusted lieutenants into the Naga. Queen Azshara now resides in the vast naga capital of Nazjatar (formerly Zin-Azshari)at the bottom of the ocean, under a vast whirlpool known as the Maelstrom. She has embraced the power of the naga, grown in size, and possesses many tentacles bedecked in jewels and items of power. She plots her revenge on the treacherous Night Elves, biding her time until the growing might of the naga can be brought to bear.

Appears in the Warcraft manuals.
Also appears in the War of The Ancients Trilogy