Dragon

Dragons are a planned mob. Notch hinted during the Spider Jockey update that he will add Dragons to the game. It is also mentioned that dragon lairs may be an addition. It is not known which version that Notch plans on adding them, and there has been no previous work that he has displayed to show that he is currently working on dragons at this moment, and remains a potential work-in-progress until future updates come. It also should be noted that one of the random messages on the title screen is "Absolutely dragon free!".