The Horde Goes to War!

So, what was the deal with the frost wyrms in Orgrimmar yesterday? When did Lady Sylvanus decide a move to Durotar was in order? Why was Thrall battling beloved Grom Hellscream's only son, Garrosh? And, most importantly, why will millions of players pay an additional $40 this week to play World of Warcraft? This video, made by one of my guildmates, explains it all.