Task: Question Generation
Input (English): The mightiest team of mages from the magic kingdom's most infamous guild faces evil rising from the embers in this action-packed feature length adventure. Follow Fairy Tail's dream teamNatsu, Gray, Erza, Lucy, Wendy, Happy, and Carlaas they lend a helping hand to a girl with little memory and a grudge against wizards. As they uncover clues about her mysterious past, a lunatic prince hatches a half-baked plan to sacrifice her in exchange for immortality. When the fool unleashes an ancient force, a raging war becomes the fiercest inferno Fairy Tail has ever faced. Can the guild with a heart of gold save the planet from a fiery finish?
Output (English): What type of force does the prince unleash?