Dai starts as this wide-eyed kid who wants to be a hero, and the show actually lets him become one, but not the way he imagined. Every character who dies stays dead, every loss reshapes who Dai has to become, and by the time you realize this isn't a Saturday morning adventure anymore, you're already invested in a kid who's learning that heroism means sacrifice. The 1991 animation holds up because it's drawn with actual weight behind every swing of a sword; this isn't nostalgia talking, it's craft. Find it however you can, it's been buried under licensing hell for decades, because this is the shonen backbone that every adventure anime after it was built from.

A boy raised among monsters on a peaceful island dreams of becoming a hero. When the demon lord Hadlar is resurrected, the former hero Avan arrives to train him, and that dream suddenly feels within reach. Hadlar soon comes to kill Avan, declaring that he now serves an even more powerful demon lord. Avan sacrifices himself to protect his students, and in that moment of despair, Dai discovers a hidden power awakening inside him, along with a strange mark on his forehead. Dai sets out with Pop, Avan's other student, to avenge their teacher and bring peace back to the world. The result is a fantasy adventure with a comic streak.