In the upcoming expansion, you will finally be able to play classes that were previously unavailable to your faction. The blood elves have harnessed the power of the Light for their own needs, and the Horde recognizes the value of these renegade blood elf paladins. Meanwhile, the draenei have been granted the wisdom and strength of the elements, and a number of draenei now follow the path of the shaman.

Not long ago, in Outland...

Prince Kael'thas Sunstrider and his blood elves waited until the newly arrived naaru departed Tempest Keep. He had little interest in what the naaru hoped to accomplish on this shattered world: it was Tempest Keep that had brought him here. At the prince's signal the elves stormed the dimensional fortress, quickly defeating its automated defenses and claiming its satellite structures. The only real threat the elves discovered was a lone naaru who had stayed behind to maintain the keep's defenses. With some difficulty, Kael'thas subdued the energy being and sent it to Quel'Thalas so that the magic-addicted blood elves could feed upon it.

Back in the capital city of Silvermoon, Magister Astalor Bloodsworn was not content with this idea. After long months of study and experimentation, he and his fellow wizards learned how to manipulate and corrupt the naaru's luminous energies. In the end the wizards devised a process by which the powers of the Light could be transferred to recipients who had not earned such abilities. Instead of feeding upon the naaru's magic, the blood elves would wield the naaru's Light-given powers themselves.

Lady Liadrin, formerly a priestess, had recently renounced her vows, for she felt the Light had abandoned her people. She learned of the wizards' achievement and volunteered to be the first to bend the stolen powers to her will. With her decision a new order was born: the Blood Knights. These renegade paladins are able to harness the sacred powers of the Alliance's noblest heroes.

Most members of the Blood Knights were once part of the Royal Guard – proud defenders of high elven society who came to believe that the Light had failed them in their hour of greatest need. They see their appropriation of the captive naaru's powers as well-deserved justice.

Although Warchief Thrall and High Chieftain Cairne Bloodhoof openly opposed the blood elves' methods, they recognized the Blood Knights' strategic value. Indeed, it is likely that the group figured heavily in the Horde's ultimate decision to offer membership to the blood elves.

Blood elf paladins have swiftly grown confident in their borrowed abilities. Nevertheless, as even the most inexperienced mage will attest, when powerful forces are manipulated against their intended purpose...

The consequences can be perilous.