Perhaps signaling the imminent arrival of the pre-expansion v6.0 patch, Blizzard has announced that the Gaze of the Black Prince buff for World of Warcraft will be in effect from September 2-14. The Gaze of the Black Prince assists players with obtaining the necessary resources to create their legendary Pandaria cloaks, a lengthy process that is shortened measurably with the buff.
Blizzard's post specifically states that this is the final time players will have an opportunity to take advantage of the buff, a likely portent to the arrival of the pre-Warlords of Draenor patch, v6.0 that will bring significant changes to all classes and introduce the "bridging" lore preparatory to November's release of the expansion.
Beginning Tuesday, September 2 at 10:00 a.m. PDT, through Tuesday, September 16 at 9:00 a.m. PDT, we’ll be applying the Gaze of the Black Prince buff for the final time before the Warlords of Draenor expansion. This buff will increase the reputation gained with the Black Prince by 100%. It will also increase the chance of obtaining items from his foes needed as a part of the Legendary Cloak quest line including: the Secrets of the Empire, Sigil of Wisdom, Sigil of Power, or Titan Runestones.
Read more on the World of Warcraft community site.