Unlucky Yarn

The Unlucky Yarn is a pet-summoning item which summons a Black Cat pet that follows the player around. It is obtained from a Goodie Bag with a chance. It does no damage to enemies and does not affect the environment in any way. It will fly on a broom to catch up with a player that moves too far away from it.

Trivia

 * The "Unlucky" in the item's name references a common superstition that black cats will bring bad luck.
 * Black cats are often a stereotypical familiar for witches, hence the cat wearing a witch's hat, and the flying animation depicting a witch's broom.
 * The hat appears to be the Wizard Hat dropped by Tim.