A World-Class Mage Who Is Arrogant in Middle School

"No, it's impossible. He's actually a mage? Your spiritual energy is thin, you... How can you still use arcane magic?" "Humph, traditional mages rely on chanting to resonate with the spiritual energy of the world and cast spells. However, this immortal possesses the inner elixir and is walking on the path of cultivating immortality. The spiritual energy is stored in his own Dantian, forming a world of his own. How can the thin spiritual energy hinder this immortal from casting spells?!" The spiritual energy has been thin for six hundred years, the martial arts has flourished, and the magicians have disappeared. And now a young man swears an oath here: "It is our duty to restore the glory of the mage! I, Finn Spencer, will definitely become the greatest mage in the world!"