The Worst Unrivaled Magical Seeker : From Zero Mana to a Heroic Sinner through Wisdom and Forbidden Spells

Despite having zero mana and physical strength, Eric sets out on a perilous journey to find a way to break an ancient curse placed on his sister. However, through his quest, he acquires ancient wisdom and forbidden spells, which eventually shakes the world with various monikers such as "Dragon Slayer," "Ruin Plunderer," and "Mad Researcher"... This is a magical fantasy world where he wields wisdom and forbidden spells in search of a single answer!