Grey Riding Yak
Requires:
- Level 85
- Artisan (300) Riding
Source:
- Uncle Bigpocket in Grummle Bazaar, Kun-Lai Summit
- Cost: 3000g
Account-Wide:
This mount is bound to your Battle.net account, not to a single character.
Speed:
| Apprentice (75) | Journeyman (150) | Expert (225) | Artisan (300) | Master (375) | |
|---|---|---|---|---|---|
| Land Speed | +60% | +100% | +100% | +100% | +100% |
| Air Speed | N/A | N/A | N/A | N/A | N/A |
| Swim Speed | +0% | +0% | +0% | +0% | +0% |
Introduced in MoP
More info: 
Wowhead