Oshu'gun, the largest known diamond in the universe, means many things to many people. To the ethereals of the Consortium, Oshu'gun means profit. To the Orcs of old, it was holy ground. To the Draenei and the Naaru, Oshu'gun is a transdimensional spaceship that was used to save a dying race from their doomed homeworld which had been overrun by demons. Sweet.
We all know, or should know, the story of the Draenei by now. It's been beaten into our heads in many different ways in the World of Warcraft. If you don't know the story, let me sum it up for you: About 25,000 years ago, Velen, Archimonde, and Kil'jaeden were the top cats of a race called the Eredar. Sargeras approached them with promises of power and whatever else, with a hidden malicious intent. Archimonde and Kil'jaeden jumped on it, but Velen, being a prophet, had bad feelings about the arrangement. He and those loyal to him avoided falling into the grasp of the Destroyer of Worlds until a savior(...sort of) in the form of K'ure came along. K'ure explained the nature of the Naaru to the Prophet, and Velen gathered the Eredar loyal to him. They loaded up into a ship(later named Oshu'gun by the orcs) and escaped Argus, taking the name "draenei" meaning "exiled ones" in the language of the Eredar.
They rocketed around space for awhile, all was good. Then they crashed on some random planet. That's okay though, it was a pretty cool planet so they decided to name it after themselves. They named it 'Draenor' which translates to "Exile's Refuge." It beats me how 'or' means 'refuge' but who am I to question galactic fantasy languages? When Oshu'gun crashed, the Naaru that dwelled within and powered the vessel were severely damaged or outright killed. K'ure was severely wounded and still dwells within the vessel, sitting on the brink between life and death. D'ore, the other Naaru involved in the crash, died on impact. He was relocated to the area now known as Auchindoun and buried there, the first to be buried in the area later known as the Auchenai Crypts.