Cinder Kitten

The Cinder Kitten combines the cuteness of a newborn cat with the searing magma of the Elemental Plane of Fire. Gift one to each of your guildmates and turn every raid night into an incendiary itty bitty kitty committee.

Source
This item is available from the shop or the In-Game Store for $10 or €10. It was released on December 4, 2012.

Pet Journal
''A playful, purring pyromaniac. Don't pet these kittens without fireproof mittens!''

This Cinder Kitten will char your face off with cuteness.
 * In-Game Store

If you can’t stand the heat, stop petting it ''Combining the cuteness of a newborn cat with the searing magma of the Elemental Plane of Fire, the Cinder Kitten arrives on scene as the year’s hottest companion pet. Get each of your guildmates to get one of their own, and turn every raid night into a fiery feline frenzy.''
 * Blizzard Shop

Letter
Players are mailed this pet by Breanni: