Urban Superpower: Who Taught You How to Use the Sword?

Everyone in this world practices psychic abilities. Seven realms span the world. Psionics control elements and control divine weapons. And he was transformed into an orphan with no background. During the entrance test, everyone laughed at him for being a novice with wood attributes. No one knows There is a black sword hanging in his body that can 'shatter space'. There are five "ancient runes" sleeping in his body, He personally suppressed the talents of the weapon and sword systems and chose to hide his clumsiness. When he was assassinated on the way home from school, the black sword automatically protected his master. He chopped up the space with one strike and the assassin didn't even scream.