Thunderlord clan

The Thunderlord clan was an orc clan that existed for a very long time on Draenor. It remained behind during the first and second wars, however when Ner'Zhul wanted to open new portals, they immediately volunteered. Unfortunately their clan leader decided to attempt to head into Azeroth and accomplish what the second war did not. Ner'Zhul did not approve of this, and he slaughtered the entire Thunderlord clan.

Invasion of Draenor
After the First War, the Thunderlord clan was said to maintain the last of the wolf-riding Raiders (excepting those of the exiled Frostwolf Clan). The Thunderlords were led by an orc named Fenris the Hunter, presumably also a Raider. The Thunderlord clan represented some of the best mounted cavalry in any clan. They had strong connections to the Blackrock clan; in fact, Orgrim Doomhammer initially rose to power as a member of this clan. It is unclear how this is possible, however, as orc clans were very segregated and members avoided close contact or friendship with members of other clans before the formation of the first Horde.

When the Bleeding Hollow clan returned, Fenris was immediately thrilled, believing that he would be able to return to Azeroth to finish the job that Doomhammer had been unable to. Ner'zhul, however, did not share that vision.

Fenris and his clan were defeated by the Shadowmoon Clan. Garm Wolfbrother succeeded Fenris but was eventually killed as well.

After the war
They were transformed into fel orcs through the blood of Mannoroth and abandoned their village. After that the Bladespire clan took the village.

The Burning Crusade
Thunderlord Stronghold was taken from the Bladespire ogres by the Horde and now is a Horde-friendly town in the Blade's Edge Mountains. It is the remains of the Thunderlord clan's holdings, used as a base of operations by newcomer Horde forces. Although the guards are called Thunderlord Grunt they are not part of the Thunderlord clan.

The clan appears wiped out, with quest lines focused on revenge on the ogres and with finding a way to heal the spirits of the dead. Currently the quest lines end when you are able to communicate with the ghosts of the dead.

Rexxar, Champion of the Horde, now resides in the stronghold since the reopening of the Dark Portal. He protects the base from any beasts, and monstrosities that lurk within Blade's Edge. Rexxar eventually hopes to find more of his people, and perhaps make peace with his father Leoroxx, the chieftain of the Mok'Nathal clan.