Te'liu

History
Te'liu was a massive Golden serpent, infused just before hatching with the waters of the Vale of Eternal Blossoms, she radiated with the power of light and dawn, able to easily push back darkness from encroaching upon the Vale. She was a friend to many of the Pandaren, and even left the Order of the Cloud Serpent with the charge of taking care of her clutch her in her final moments.

The Sha
Te'liu had guarded the Vale for some time, along with the other serpents of Pandaria. However, when the Alliance and the Horde unleashed the Sha with their war, the massive Serpent was locked in battle with the Sha of Anger. She lost this battle, and thus much of her power was lost. She fell stories, her radiance seeming to die in the depths of Azeroth.

Her last clutch.
Rumoured is, that in her final days she sent the last of her eggs away to the Cloud Serpent order, to be given sanctuary from the Sha plague that now infested her soul. So prevent the Sha from overtaking her, she sealed herself away in one of the Mogu's vaults. However, now that the Sha has been eradicated...it is only a matter of time before she shows herself again.