Moonkin Egg

Source
This item is found inside a Moonkin Egg, which is available from the shop or the In-Game Store for $10 or €10. It was released on November 29, 2010 along with Lil' Ragnaros.

Opening it will give you a Moonkin Hatchling for your faction.

Contents

 * Moonkin Hatchling
 * Moonkin Hatchling

Mail
Players are mailed this pet by Lunaclaw: