Patch 5.4 is now live on the PTR servers for testing, and it has several ... dramatic changes, both to the world and to the characters in it. While patch 5.3 may seem small on story, there's actually plenty going on -- more than enough to serve as a catalyst heading into the new patch. In fact, plenty of the events in 5.3 directly effect what's going on in patch 5.4. Although we don't know the whole story just yet, considering the PTR is a test realm that may undergo changes as time goes on, we do have enough to tie 5.3 and 5.4 together in a significant way.
If you've been following the lore, you may have seen the signs already and know what to expect. But if you haven't been paying much attention to the story, or you're wondering what's going on with those images people have been posting from the patch 5.4 PTR, we'll do our best to get you all caught up. Mists of Pandaria has been an expansion chock full of new story, and patch 5.3 has certainly been no exception to this -- but 5.4 is shaping up to be the biggest hit we've seen so far in Mists.
Please note that today's Know Your Lore contains some spoilers for patch 5.4 content. If you're avoiding spoilers, turning away now would be advised!