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
 * The pet has the elf pet inventory icon.