Green Proto-Drake

This rideable proto drake is quite rare despite the other drakes in the game. If you have this mount, then hats-off to you.

This drake is obtainable from the Cracked Egg given to you by the oracles as a gift. There is a rare chance that this egg will obtain the mount
(rumor has it around 3%), so cross your fingers!

If you don't get the mount, then you can still get the other cool pets that are available in the egg:

• 
  
• Tickbird Hatchling
  
• 
  
• White Tickbird Hatchling
  
• 
  
• Cobra Hatchling
  
• 
  
• Proto Drake Whelp

Good luck and good hunting!

Edit: As of the recent patches, the egg now contains Aged Yolk, which is good for those of you who need allot of health. If you want the pet/mount, don't hope for this!

To start your journey on getting an Egg, find an injured Oracle lying on the floor

http://www.wowhead.com/?npc=28217

And the whole scenario starts from there. Quite simple daily quests also. Three quests a day and each gives 500 (one gives a bit more).

Got it on my third egg :)

Source is currently unknown, but here is a link to the page with all the mounts from Wrath of the Lich King. I hope, and suppose they will be updating it as soon as the sources are known. Link: http://www.mmo-champion.com/index.php?page=824