The Most Powerful Magician? Sorry, He Is My Apprentice

(Invincible + no harem + magic + high martial arts + overhead + city) The most powerful magician in City A, with the power of one person, swept through armies from all over the world, and broke into the forbidden area - the ancient secret realm without any harm... Such a powerful person was actually Fan Yi's apprentice. The ninth-level super magic that only exists in theory was just created by him? During World War I, Fan Yi single-handedly swept through all countries with his super powerful martial arts. The United States spent several years activating the "unknown" that was immune to the damage of warriors. Fan Yi smiled and raised his hand with a ninth-level super magic.