I Killed a Dragon, I'm Still Weak

Belittled as useless since childhood, Leo leaves the mountains for the Royal Academy exam and performs miracle after miracle. Bullied by a wealthy rival, he quietly endures. When Dragon Isle unleashes its horde and the Blood Abyss Dragon breaks free, his masters reveal the truth: Leo is Odin's son. He awakens the Oblivion Stone, kills the dragon in one strike, and saves the world.