S8·E20 The Green Heart of Lynphea

The Winx reach Linphea and enter the Great Forest to retrieve the fourth prime star, but, having reached the Green Heart, they are attacked by the Trix. Even Miele went into the forest, despite Flora having forbidden it because it was dangerous, to help the fairies: Darcy takes advantage of it and, after making Miele pass out with a spell, takes on her appearance, pushing Flora to help her and thus taking her prime star without interference.