Gives the quest: "The Mysterious Egg." After accepting the quest, you need to find a pet merchant and purchase an "egg warmer" for 10c. Place the egg warmer in your home. Right-click the warmer, and click the option: "Place the egg." After the egg is placed in the warmer, you can right-click the warmer for the option: "Check the egg" to claim your pet. If it's greyed out, the egg isn't ready to hatch yet. Mine only took about 15 minutes to hatch. When all is said and done, you'll receive an Aviak Hatchling for your time and effort.