The battle between Illusia and Saint Lilyxila is on the horizon! And while Illusia has been working hard leveling up and evolving, the saint has been busy as well—teaming up with Illusia's father, the Dragon King Diabolos. But that's not the only surprise in store for Illusia and his friends. When Aluanne, the saint's sidekick and Devil of the Great Prison, comes to make playthings out of Illusia's party, it's Treant who steps up to save the day! Will the bumbling tree spirit finally become the hero it was always meant to be?