Sha

The Sha were the malevolent spirits slumbering within Pandaria prior to the Mists lifting in 30Y. They were awakened by the faction war between the Horde and the Alliance, then slain for good by heroic adventurers.

They are known to come from the fallen Old God Y'Shaarj, slain long by the Titans. As the destruction of the god's physical form almost ripped Azeroth apart, the Titans instead opted to chain what remained of the horror. Its seven severed heads then became the largest Sha manifestations haunting Pandaria. They were kept in check by the Shado Pan.

One of the heads, the Sha of Fear, possessed the last mantid empress and almost destroyed the mantid empire in the following chaos.