Palladium shows the Winx the Alfea Magical Reality Chamber, a simulator that creates a virtual world. For the midterm, the virtual world will simulate a dead planet, in which the fairies must survive in its conditions.
The midterm begins. Palladium warns them that whatever happens to them in the virtual world is for real. Bloom goes first, and the simulator, which randomly selects the dead planets, chooses Sparks. The Trix project themselves into the virtual world, and Bloom transforms and blasts Darcy with a powerful fireball. The Trix use various attacks while taunting Bloom in an attempt to get her to use dragon fire. When they send Kiko falling toward the lava, she gets enraged and uses a dragon fire attack. The Trix capture some of the dragon fire, completing their mission. Bloom collapses from the force of the attack, but Kiko survives due to a protection spell Bloom cast.
Unable to access the chamber, Palladium uses an emergency spell to shut it down. He gives Bloom an A+ and says that the chamber malfunctioned, and while he fixes it the test will be postponed for the others.
The Trix are about to use the dragon fire's power to become more powerful and rule the universe, when the dragon fire escapes from them.