An Artifact From the Past

Illidan's attention is now on Kael'thas, thanks to you. The time has come to make our move. I've had a vision of an artifact that will aid us in our final struggle - the phylactery of a lich known as Winterchill. Unfortunately its power was lost forever after his defeat in the Battle of Mount Hyjal. There might be a way to retrieve this artifact, however. Legend speaks of a place in Azeroth guarded by bronze dragons... a place where past and present meet. It is there you will find what we seek.