The Silithyst Must Flow
In faraway Silithus, geysers of a strange red crystalline dust have started to appear in the desert. Both the Alliance and the Horde have taken an interest in this new substance, which is called silithyst, and researchers on both sides have discovered unique and valuable properties in the dust. The Horde and Alliance camps in the region have both been outfitted with turn-in stations where adventurers can unload the silithyst they collect.
There are two methods for collecting silithyst. The most obvious one is to simply pick it up from a geyser. A character can carry only one load of silithyst at a time, so whenever you collect some silithyst, you should immediately return to your faction's encampment. Nevertheless, be careful: the dust's glow makes you very easy to spot, and the silithyst automatically makes you a target for members of the opposite faction. Until you turn in the silithyst you are carrying, an enemy can slay you and pick up the dust you dropped in death. Of course, this enemy in turn becomes a target.
Once either the Alliance or the Horde has acquired enough silithyst, that faction's base will send off a full shipment of the dust, and the count for both factions will be reset. All members of the winning faction in Silithus will receive a buff, and the race for the precious silithyst will begin anew.