Origins
Naaru
Upon a barren rock remained the last life of an ancient race. After all their forefathers had done, after the life they had brought, after the horrors of their mistakes, the Xel'Naga had not been fully evolved after all. All that remained for them was their lament.
All had lost everything, including their life. Only a rare few had remained, too young to share the psychic links of their elders. Unable to sense them, the Zerg ignored the escape pods that held them. The Xel'Naga had been filled with the history of their race, and so remembered all that they had ever learnt. Finally, those that remained figured out what their ancestors did wrong.
The Xel'Naga themselves could remember no interference from a higher race. They might have been changed by some greater creature, but the creature had never remained to watch the race. Any catalyst that had granted them sentience and power had only interfered once, as opposed to their attempts with the Protoss and Zerg.
The natural need to help within the Xel'Naga was instinctive, however. Even those who resented the Zerg could not refuse the need to help. Some had learnt to remember that just because a race has not reached a higher level does not mean it must. Nor does it mean they will not on their own, reminded the leader. He, along with the others, refused to take a name, because their psychic bond was too strong.
They meditated on their actions, hoping to find a way to make amends. During one of these sessions, the mind of one Xel'Naga reached a horrid mind, one that had consumed vast knowledge and life. They were all touched, Xel'Naga and Zerg, regardless of where they were. The Xel'Naga had been found, and the Zerg wanted them.
The few living Xel'Naga raised a psychic barrier around their small asteroid. The leader entered into a deep trance, searching for any power that could save his people. At last, he found it on a world being ravaged by five dark beasts. He could feel the terror, hatred, and fury. He could see nothing but destruction in the distance. The fifth was covered in darkness, and could not be identified.
From behind him, a voice whispered to him. "This is my world, as it was only a few years ago. This is not the mortal plane, however. No, that fell almost an eternity ago. This, which you see before you, is in fact the heavens, the angelic plane. This is where I lived."
The Xel'Naga turned. What he saw was a figure bathed in light, with tendrils of this light reaching from his back. "I am Tyrael, and I can save your people, if they will follow the path of light. They will need to save races from doom. Only those who are being attacked, not those who you feel should succeed," he added. "Do you accept?"
The Xel'Naga accepted. "Each of your kind shall take a name. Your name shall be Naaru, the Guardian of Light." And so Tyrael left Naaru to his business, and watched the world of Sanctuary as it burned, as the five summoned those of fire, wind, water and earth. He foresaw the coming of Amun'Thul, Eonar, and Norgannon. And he foresaw the races standing against the Burning Legion and the terrors of the Old Ones, sealed beneath the eternal chaos of Sanctuary.
AN: How many of you thought of a connection like that? I have just combined the main three Blizzard universes into one, massive universe.