Obols a limited-time currency released on October 4, 2016, for the Treehouse of Horror XXVII Event. They are the only currency used to craft prizes in the event. They can be obtained: * By tapping Feral Monsters that spawn in the player's town, with a 10% chance of being dropped. * By completing event themed Daily Challenges. * In packages from personal prizes. * By sending kids on Trick-or-Treat jobs.