For thousands of years the Mogu were the dominant race in Pandaria and the Pandaren just slaves. How did the Mogu deal with the Sha then? They seem like a very angry lot so I bet it would be easy for the Sha to posses them and wreak havoc there. Do the Mogu have anything that make them more resistant/immune to the Sha? Maybe their stone skin, or spirit binding spells? Maybe a titan blessing left behind? Does the game explain this in any way?