Job Transfer for All: Forbidden Curse? Master, I Have Plenty!

Lin Yuan traveled to a world full of crises, but in this world, everyone has the opportunity to change jobs! As a genius, Lin Yuan changed his job under the spotlight and became a magic book manager with 130,000 magic books! Lin Yuan, who possesses millions of magic powers, subverts people's common sense. "What's going on? Why does this mage heal others? Isn't this the job of a priest?" "Lin Yuan is a mage! Why is he chasing the monsters with his sword and releasing magic at the same time!" "I lost to Lin Yuan in close combat. Is he a boxer or am I a boxer?" One day, the devil invaded. "Oh my god! Why does this Master's forbidden spell cost no money? I've used a hundred of them and they still don't have the same copy!"