Once called the Temple of Karabor, a sacred site to the Draenei, the temple fell to the might of Gul'dan's Horde, who proceeded to transform it into a headquarters for the Shadow Council.

The Spire of Karabor is likely a piece of the temple itself (or perhaps the Altar within), fueled by years of Draenei faith and prayer. Pretty cool.

Shadowmoon Valley: Amid rolling moonlit hills, the draenei at the holy temple of Karabor unite with the Alliance in a desperate fight for survival against the Iron Horde and Shadowmoon clan.