In the Alfea College of the ancient past, Kalshara, a fairy with dark intentions, manages to access an old hall. Crossing an ancient Wild Magic source, she becomes a shapeshifting animistic creature, the first step to obtaining the fairy animals' Ultimate Power. The seven Winx girls fight against the elemental creature cast by Brafilius and after defeating the monster (and realizing that even their Bloomix powers and Roxy's Believix powers are not as nature-based to save the Digmoles), they, excluding Roxy, earn a new and even greater magical power derived from nature itself - Butterflix.
