Patch 4.3: Hour of Twilight features something for everyone. From a new raid to unexplored dungeons to the latest story developments to shake the world of Azeroth, this content update introduces a new tier of armor sets, the legendary "Fangs of the Father" rogue quest line, Transmogrification for cosmetic armor and weapon customization, Void Storage as a handy long-term storage option, Raid Finder to make forming pick-up raids easier than ever, and much more. Read more about the lore behind this trailer below, or check out the comprehensive overview here: http://us.battle.net/wow/en/blog/3964559/Patch_43_Hour_of_Twilight-11_22_2011#blog
In the wake of the Cataclysm, Azeroth's champions rose up to thwart the forces of the maddened black Dragon Aspect, Deathwing. Thus far the world's defenders have shattered the power base of the Twilight's Hammer cult and defeated the raging elemental lords Al'Akir and Ragnaros. Yet despite these victories, as long as Deathwing is free to pursue his twisted goals, Azeroth will remain under threat.
No one is more aware of this fact than the great Dragon Aspects Alexstrasza, Nozdormu, Ysera, and Kalecgos. Together with the wise shaman Thrall, they have devised a plan to vanquish Deathwing with a weapon of his own design: the infamous Dragon Soul.
In patch 4.3, Thrall and the noble Aspects will call upon the Horde and the Alliance to help them retrieve the artifact--no longer in existence--from the distant past. Those brave enough to face the challenge will embark on a perilous journey from Azeroth's apocalyptic End Time to the Dragon Soul's point of origin during the catastrophic War of the Ancients. If the heroes succeed, an even more harrowing battle awaits them in the present....