Single Spell Sorcerer

The Celestial Express is a train that goes from one galaxy to the next, picking up passengers along the way. Its Navigator, the one who drives it through the stars, is a god who can grant those passengers wishes. Jax arrives on the Celestial Express with no memories but a single wish—to save someone. After learning what the Navigator is capable of, he decides to go find him. To find the Navigator, he must go through TEN different Carriages, all of which contain a world of their own. And, he must do it with a restriction called Single Spell Sorcerer.