So What happened to the Keepers and the Watchers who were left behind? What became of them? When you travel to Northrend, in the Wrath of the Lich King expansion, you travel with Brann Bronzebeard, a bit of an archeologist, and discover much about the History of Azeroth. And you start with Thorim.
Thorim is a Keeper created by Golganneth, he is an Aesir, or platinum-skinned titan, and has powers of storms, lightning and air. Together with Hodir and Ra, he defeated Al’Akir, the Windlord. Thorim married Sif, a female vrykul from the Hyldnir clan, all female blue skinned frost vrykul, that ride warbears into battle. Under the influence of Yogg-Saron, Thorim’s brother, Loken, had an affair with Sif. The Old God’s whispers muddling his mind, Loken became afraid that Sif would leave him and he fought with her, accidentally killing her. Terrified at the thought of what his brother would do if he found out, he lied and told Thorim that the Frost Giants, led by King Arngrim, were the ones that had killed her.
Now Arngrim and the Sons of Hodir, were allies with Thorim. They were the creations of the Keeper Hodir, but they had worked with Thorim in the past to defend Ulduar and they were friends. After Loken told him of Sif's death, Thorim went to war against them and, in a fit of rage, Thorim threw his hammer, Krolmir, at the mass of fighting armies and created a huge explosion that killed Arngrim. The Frost Giant, as his last act, cast a rune on the hammer, preventing anyone from picking it up. This battlefield can be found in Stormpeaks in WoW where the huge crater left by the hammer Krolmir can still be seen.
Overcome with grief Thorim retreated to the Temple of Storms, and lapsed into despair. Loken used this opportunity to create an army of titan-forged, under the guise of stepping in and ending the conflict, but he did not know that Yogg-Saron had tainted the Forge of Wills with the Curse of Flesh. Driven mad by the whispers of Yogg-Saron, Loken feared what would happen if the Pantheon and the other titans discovered what he had done, so he decided to act preemptively to take them out. Loken rationalized that if he had to make an alliance with an Old God in order to save himself, he would.
First he killed Mimiron, making it look like an accident, and then he captured Hodir and Freya and offered them to Yogg-saron who basically mind-controlled them.
Hodir was the Father of the Frost Giants, called the Sons of Hodir, and many people think he is also Greatfather Winter who is venerated by the dwarves. (Santa Claus) Freya was the Keeper in charge of the life on Azeroth, and gave Alexstrasza her powers.
Mimiron’s mechagnomes saved him, making him a mech body that he was able to transfer his spirit into, but he was never quite the same after.
Loken convinced Helya to turn on her foster-father Odyn and imprison him in The Halls of Valor, using the same magic she had used to imprison the elemental lords in the elemental plane, in order to get revenge on him for turning her into a val’kyr. Then he waited in fear for Keeper Ra to show up, but he never came. After feeling the shock of the Pantheon’s power returning to them, Ra had figured out that they must be dead and had locked himself in the Mogu’shan vaults in despair.
All that was left were the Keepers Archaedes and Tyr. They saw what Loken was doing and ran, taking with them the remaining earthen, vrykul and mechagnomes, as well as the Discs of Norgannon which record all history on Azeroth, in order to expose the extent of Loken's betrayal.
When he discovered this, Loken sent Yogg-Saron’s servants the C’Thraxxi after them, and Tyr sacrificed his life to fend them off while the others escaped.
Afraid of what would happen to him if the Pantheon ever discovered what he had done, Loken created the Tribunal of Ages, which is basically a false history of everything that had happened, and painted himself as a hero.
In an attempt to stop the curse of Flesh, Loken kicked all the affected titan-forged out of Ulduar and put the rest to sleep in stasis for thousands of years.
Things in Northrend are Frozen……...literally it seems for thousands of years until the player goes to Northrend in the battle against the Scourge. All this history is discovered in-game by travelling with Brann Bronzebeard who is fascinated by titan machinery and history and searches for the Tribunal of Ages.
You quest with the Hyldnir in Storm Peaks and rescue a maiden known as Lok’lira the Crone, who sends you off on a quest to make peace between the Frost Giants and Thorim. As you earn the Frost Giants’ trust, the betrayal between them and Thorim is revealed, but the Sons of Hodir are open to peace, as they have grown tired of the conflict. You go to see Thorim himself and as you retrieve his armor, and his proto-drake and finally arrange a meeting between him and the present day leader of the Ice Giants, King Jokkum, you achieve the impossible.
Thorim says: Jokkum, son of Arngrim, I have always regretted my actions here. In my grief, I brought great harm to those closest to me. I would ask your forgiveness for the suffering I have caused you and your people.
King Jokkum says: Never have such humble words come from mighty Thorim. I shall deliver your words to Dun Niffelem. The events of that dark day are hereby forgiven by my people. They shall never again be spoken of. To signify our reforged friendship, I have something which belongs to you...
Jokkum summons Krolmir, encased in a block of ice.
King Jokkum says: As the great explosion filled the region, my father cast a rune at the great hammer that it might not be had by our enemies. It was his final act...
Thorim says: Krolmir... I thank you Jokkum. I hadn't dared hope it still existed. It shall soon see glorious battle once again!
King Jokkum says: We welcome the opportunity to fight by your side, mighty Thorim.
This is when Thorim and King Jokkum together go to fight against Loken and his iron-forged warriors who are destroying the Earthen and the mechagnomes that fight to protect Ulduar, and also the Frost Giants who he attacks as well. But there's a surprise twist! Turns out this was a long and convoluted plan. The Crone who sent you to mend the rift between Thorim and the Sons of Hodir is non other than Loken himself. He needed to get Thorim out of his seat of power, where he was strongest, so that he could attack him. Using the power of Yogg Saron he captures Thorim and takes him away to the depths of Ulduar where Yogg muddles his mind, appearing to him as his long dead wife, Sif.
In the raid, you must defeat Mimiron, Hodir, Freya and Thorim, who are all controlled by Yogg Saron, but if you do, their minds are clear and they can help you defeat him in the final battle.
When you confront and kill Loken, he warns you that his death heralds the end for Azeroth. As the Prime Designate, he plays a special role, laid out in advance by the Titans of the Pantheon, as a failsafe mechanism. If the Prime designate were ever to be killed it would trigger a protocol that would call down to Azeroth a constellar titan known as Algalon the Observer. If this titan judged that Azeroth was suitably corrupted, he would trigger an extinction event that would render all life on Azeroth back to it’s component parts. And start over. You’ve just ended the World. Of course you must defeat Algalon, proving that the races affected by the Curse of Flesh, are not inferior defects that must be purged. You must fight for the right to exist. And you do. Algalon, in defeat, is impressed in spite of himself, and muses that it is possible he was wrong.
"I have seen worlds bathed in the Makers' flames, their denizens fading without so much as a whimper. Entire planetary systems born and razed in the time that it takes your mortal hearts to beat once. Yet all throughout, my own heart devoid of emotion... of empathy. I. Have. Felt. Nothing. A million-million lives wasted. Had they all held within them your tenacity? Had they all loved life as you do?"
He decides that as you have managed to defeat him, and he could not foresee that, or prevent it, that his logic may be faulty, so he gives you, and Brann Bronzebeard, the codes to stop the extinction event.
"Perhaps it is your imperfection... that which grants you free will... that allows you to persevere against all cosmically calculated odds. You prevail where the Titan's own perfect creations have failed."