We have three codes to give away, one for each of the cards in the set. That's the awesome chicken mount El Pollo Grande, the Ogre Pinata and the groovy Path of Cenarius.
The only caveat is you must have a European WoW account or the cards won't work (sorry to our American brethren) so please make sure before you enter, okay? Also, you can only enter once and, yes, we will know if you enter more than that. Good luck to all who participate!
Thanks to Tom at Upper Deck International's UK office for the codes.
UPDATE: The competition is now closed! We'll be announcing the winners later on this evening.