Vorgendor
Vorgendor (also called the Blood Dimension) is the mysterious worgen homeworld.[1] Once a realm where Elune's favored servants lived freely, an invasion from the Burning Legion resulted in the corruption of the world. In a desperate bid to fend off the demonic invaders, the worgen forsook Elune in favour of blood magic, tainting the once-blessed race.
History
Originally a world where the worgen walked in harmony under the light of Elune, the encroachment of the Burning Legion (referred to as the Lords of the Emerald Flame by Velinde Starsong[2]) drove the worgen to using blood magic. Despite the dark powers at their command, the worgen are fighting a losing battle against the Legion.[1] Vorgendor is described in Ur's texts as a dark place of nightmares,[3] likely reflecting the Legion's invasion and the worgen's subsequent corruption.
At some point during the height of the Kaldorei Empire, Queen Azshara and her Highborne mages delved into forbidden arts, including opening passageways to Vorgendor.[4]