Darnassus

Darnassus is the capital city of the kal'dorei, the night elves that expelled the quel'dorei from their shores for the use of arcane magic thousands of years ago.

In the year 6,942 in the Thalassian Calendar, sin'dorei spies acting for Garrosh invaded Darnassus and stole the Divine Bell. Realizing that magi must have been involved to access the secluded city, the human leader of the Kirin Tor, Jaina Proudmoore, revoked the sin'dorei's right to rejoin the magi of Dalaran. In her anger she ordered every sin'dorei in Dalaran to be culled, culminating in a great slaughter known as "the Purge of the Dalaran". In the aftermath it was revealed that Lor'themar Theron, the Regent Lord of the sin'dorei, and King Varian Wrynn of the humans, had been engaged in re-considering their old alliance. Garrosh had somehow learned of Lor'themar's intentions and deliberately sabotaged them. Varian admonished Jaina for playing into the Warchief's hands, ruefully adding that it was unlikely the elves would consider an alliance with them now. Jaina told Varian she did not care - that the sin'dorei had betrayed the humans when they joined the Horde in the first place, and that made them forever untrustworthy.

((A roleplay note - the kal'dorei have recently begun using arcane magic, much to the amusement (or outrage?) of their sin'dorei cousins, who are the descendants of the quel'dorei the kal'dorei originally exiled.))