Annoyed that Megumin had still been using his castle for explosion practise, Verdia, after proving easily susceptible to Aqua's purification magic, summons an undead army which is quickly defeated by Megumin's explosion magic. As Verdia then battles against Darkness, Kazuma deduces that he is weak against water and has Aqua attack him with a flood. Managing to weaken him, Kazuma manages to steal Verdia's head, giving Aqua the chance to defeat him with her magic. The next day, Kazuma and his party earn a hefty reward for defeating Verdia, which is immediately put towards paying off the damages Aqua's flood caused to the town.