Shadow of the Elves - Season 1 Episode 10 Trickster

The fairies are experiencing some very puzzling events, which turn the entire village on its head. Finally, Thalia finds a clue in an old book - invisible tricksters must haunt the village. No one believes her, except Salmacis, the Spirit of the Well, who gives Thalia a clue about how to rid the villages of these little pests. Thalia has to use all her cunning to devise a plan, which involves sparkling objects, a piece of cake, and a spectacular sunset. Luckily, this proves successful in the end, and the fairies can resume their busy lives.