Dragon Quest: The Adventure of Dai (2020)

S1E3 The Hero's Tutor

Dai's monster companions suddenly fall under the influence of a sinister force, sending them into a frenzy. Brass urges Dai to escape the chaos, but their debate is interrupted by a Hero trainer who brings alarming news: the Dark Lord has come back. Determined to protect his loved ones, Dai decides to embark on a journey of Hero training.