The title given to those Blood Elves whom practice the usurped Holy magic of the Naaru. They stand as a dark reflection the Paladins of the Alliance. Blood Knights wield all of the customary Holy powers of these champions, but lack the devotion, faith or goodness of a true Paladin. Their powers are stolen in nature and the Blood Knights wield the same powers which took Alliance Paladins many years of faith and service to attain. They use these powers for their own purposes and desires, without much regard to the morality of their actions.
Here is a list of Blood Knight.