Mysterious Package

The Mysterious Package was an unobtainable pet summon item, which was supposed to summon a pet drone. It was likely intended to be available to those who bought Terraria on Amazon. It was only obtainable through hacks and was removed entirely in the 1.1.5933 update.

Trivia

 * The pet resembles Amazon.com's planned Amazon Prime Air drones, as seen in their promotional material: http://www.amazon.com/b?node=8037720011
 * It was mostly likely removed due to 505 games not getting permission to use the Amazon logo, or property, on an item implemented into the game.