Rakudai Kenja no Gakuin Musou: Nido Tensei Shita Saikyou Kenja, 400-nengo no Sekai wo Maken de Musou

After being reincarnated into another world, the great sage Ephthal dedicated his entire existence to the pursuit of magical mastery. Driven by an unyielding ambition to reach the absolute pinnacle of sorcery, he spent a lifetime immersed in relentless research. Yet, despite his tireless efforts, he eventually confronted the insurmountable limits of his own innate talent. Crushed by this realization and consumed by despair, his first life came to a quiet and bitter end. Four centuries later, Ephthal is granted a second reincarnation. Armed with the vast arcane knowledge and refined techniques he cultivated in his previous life, he enrolls in a prestigious magic academy. However, the world he awakens to has changed drastically. Over the past four hundred years, the art of magic has suffered a severe decline, leaving modern practitioners far weaker than those of his era. Looking upon this degraded state of sorcery, Ephthal effortlessly invokes legendary-class spells that the current age can barely comprehend, as if mocking the very standards they hold dear. Wielding overwhelming power born from lifetimes of study, the once-failing sage now stands unrivaled, poised to bring the entire world to its knees.