Yu'lei, Daughter of Jade

Warmth and wisdom emanate from this great creature, which glows like moonlight passing through the finest jade.

Riding Requirements:

This mount is available to all eligible characters on your account.
Level 10
Apprentice Riding (ground)
Expert Riding (flying)

Source:

Mistweaver Xia in Timeless Isle.
Cost: 5000
Only available during Timewalking

Notes:

The vendor that sells this mount is only present when the Mists of Pandaria Timewalking Event is active. Purchase requires Timewarped Badges, which are earned by running Timewalking Dungeons during the events, with a bonus 500 by handing in a quest item which drops at the end of your first dungeon for the event.