A dark power affects Dai’s monster friends, driving them berserk. Brass tries to get Dai to leave. As they argue, a Hero trainer arrives to inform Dai that the Dark Lord has returned. To save those he cares about, Dai undergoes Hero training.
You managed to learn Earth Slash
in two days, Dai.
تمكّنتَ من تعلُّم ضربة الأرض
في يومين يا داي-كن
Du hast den Erdhieb
in zwei Tagen gelernt, Dai.
Dominaste el Corte de Tierra
en dos días, Dai.
Has dominado el Corte de Tierra
en dos días, Dai.
Il t'aura suffi de deux jours
pour maîtriser Slash-terre.
Sei riuscito a padroneggiare 
il Fendente della Terra in due giorni, Dai.
Você conseguiu aprender
o Corte da Terra em dois dias, Dai.
Ты освоил удар земли
за два дня, Дай.