I Killed a Dragon, I'm Still Weak

Belittled as useless by his masters since childhood, Leo leaves the mountains to take the Royal Academy entrance exam, only to perform miracle after miracle. A wealthy academy bully keeps targeting him, but Leo quietly endures it. When Dragon Isle unleashes its entire horde and the Blood Abyss Dragon breaks free, the continent faces destruction. Then his masters reveal the truth: Leo is Odin's son. He awakens the divine artifact known as the Oblivion Stone, kills the dragon in one strike, and saves the world.