Mistletoe

 was a limited time currency available during the Winter 2015 Event's Act 2. It is used for unlocking the Act's Personal Prizes.

 could be collected by completing certain quests, tapping Merrymakers, rewarded from jobs at upgradable items released with the event and rewarded from some new buildings as income tax.

Trivia

 * The icon the game uses is a holly, but calls it a mistletoe. Mistletoe has smooth, and white, yellowish, or light green berries depending on the species.

US$