Star vs. the Forces of Evil Season 3 Episode 12 - Night Life / Deep Dive >Star decides to find out what is causing her transformations into her Butterfly form in her sleep and she enlists Janna's help to do so. They attach a camera to her head in her sleep. It is revealed that Star is attracted to a portal, but as she passes through, the camera is knocked off, and Marco begins to panic. Star wakes up in the realm of magic where she meets the First-Born, a unicorn of her own creation when she purified her magic from Toffee's taint. Star begins to lose focus and her memories as she enjoys her time in the Realm of Magic. Marco, in a last ditch attempt, uses Star's wand and activates the All-seeing eye spell. He manages to contact Star and then brings her back to her senses. After returning, Star is able to enter in and out of her butterfly form at will.