Origins
Orc
Twin nameless worlds existed, far from each other. This was before they had life born into them. In one, the corrupt beings now known as the Old Gods overtook the life and slaughtered it. From here, their corruption encroached upon the worlds connected through the Twisting Nether. The corruption reached worlds as far as Argus, home of the Eredar, and beyond.
The twin to this world, linked forever to it, yet the opposite, also had life. However, the Old Gods could not touch this world. That they were opposites meant that the twin of the ultimate corrupted realm was forever pure. And so the life thrived, unchecked by the elemental forces commanded by the Old Gods.
After the Old Gods were sealed away by the Titans, they felt the connection to this other world. They had seeded the other with life, and so the twin would have to die. The Titans refused to allow this fate, and came to the world. They changed the plants, so that they would live opposite to their counterparts. Of the animals, they found none that entered their favour.
They were puzzled, since the pink creatures that ran rampant throughout this world had no semblance to those in their counterpart world. Though they were bulky, as their dragon counterparts were, they had no wings, and could not speak the language of the Titans. Finally, one Titan, Eonar, approached these creatures. She soon found that they attempted in vain to maintain their young. She soon came to realize that the young of the dragons could survive without fail, and so the creatures would die.
She mulled over the possibilities, and finally she decided she had no choice. Just as she had done for the twin of this world, she rose to assist them. However, she knew her methods had to remain different. So, unto her, she granted the creatures three gifts.
Her first gift was the Gift of Nature. So long as they lived, they would be bound to the earth.
Her second was the Gift of Life. So long as they held blood, they would live.
Her final gift to them was the Gift of Blood. So long as they were bound to the earth, they would gain their life-force from the blood they drank.
She spilt her green blood for the creatures to drink, and they did. Then their skin changed into a brilliant green, and she could feel their life returning. The blood of Eonar could not always be given by the Titan, and so instead she left it to the mothers, who already had the blood flowing through them, to let their blood flow to her children, just as Eonar had done.
AN: I have one more I am going to do, and then I'll be taking requests for your favourite races. I've already got back-stories started for several. The next chapter will contain a crossover between the Blizzard universes. Which ones, only I know. But I assure you, it will lead to more interesting things, and may even change the way you look at Warcraft, and the world of Azeroth.