Mythical: WoW Battle Pets

Promotion: Authenticator Account Link

Guild Achievement: United Nations

Category: Reputation

Vendor: Guild Vendor - Guild

Cost: 300 (unlimited supply)

Achievement: Raiding with Leashes VI: Pets of Pandaria

Category: Collect

Promotion: Mists of Pandaria Classic Sha-Infused Heroic Pack

Pet Store 

Promotion: Mists of Pandaria Classic Sha-Infused Heroic Pack

Drop: Kael'thas Sunstrider [72+]

Zone: Magisters' Terrace

Approximate Drop Rate: 1 in 15

Drop: Grand Empress Shek'zeer [??+]

Zone: Heart of Fear

Approximate Drop Rate: Unknown