Apexis Bonus Event
Apexis Bonus Event | Weekly |
While this event is active, Apexis Crystals multiply mysteriously, and they will be found far more often when looting enemies across Draenor that typically carry them.
This world event is no longer available in game.
Official blog entry: http://us.battle.net/wow/en/blog/19816678/
Edit: This weekly event was deprecated with the launch of Legion.