Goodie Bag

The Goodie Bag is a grab bag-type item available during the Halloween seasonal event (October 20 - November 10). Each contains one random reward from the list below. Goodie Bags are opened by right-clicking them from within the player's inventory, similar to Presents and Crates. They are dropped by any enemy except statue-spawned enemies and Meteor Heads, with a 1/80 (1.25%) chance, during Halloween only.

Most Goodie Bag rewards are vanity items and decorative furniture, with the exception of the Bat Hook, Rotten Eggs, and Unlucky Yarn. The most common rewards are Rotten Eggs. All pieces of the vanity sets will be received together.

Trivia

 * Many of the vanity sets are references to popular culture. The Creeper set is in reference to the indie sandbox game Minecraft, the Space Creature set is in reference to the Xenomorph creatures from the film Alien, the Karate Tortoise is a play on words in reference to Teenage Mutant Ninja Turtles, the Leprechaun set is a reference to reports of a leprechaun sighting in Mobile, Alabama, | Reddit post by Redigit, | Remix of the report that Redigit looped while coding, and the Bride Of Frankenstein is referencing the film The Bride of Frankenstein.
 * The "Jacking Skeletron" painting is a reference to The Nightmare Before Christmas, in which the main character is Jack Skellington. The scene depicted in the painting is of Skellington at an iconic location from the movie.
 * The theoretical average amount of enemies a player must kill to get every drop this item can produce is ~1.08 Billion enemies.