We did not bring them to this land, they were there all along. But we unleashed them from their prison, allowing them to run rampant over the verdant hills and fields of Pandaria. Our arrival on Pandaria's coast was nothing more than a catalyst that sparked a chain of disastrous events the likes of which Pandaria has never before seen ... at least, not in written history.Have you had the dream again? A black goat with seven eyes that watches from the outside.
- The Puzzle Box of Yogg Saron
The Sha are a unique villain, the first in Azeroth's history that we alone are responsible for. We've dealt with the horrors of the Burning Legion, we've fought the armies of the Lich King, we've even brought down and vanquished the fallen Aspect Deathwing. But we've never before had to fight something that was spawned not from the evil of the universe, but the evil within ourselves.
Which makes the Sha utterly fascinating ... and their origins even more so.
Please note: The following post is chock-full of spoilers for Mists of Pandaria.