A Short-Lived Forbidden-Spell Mage? But I Have Infinite Lifespan!

In an era when everyone awakens to their calling, every eighteen-year-old undergoes a class-change ceremony. Most people can only awaken everyday professions, such as barber, chef, or blacksmith. Those with somewhat better aptitude can awaken support professions, such as potion maker or doctor. Those with even greater aptitude can awaken combat professions, such as warrior or mage. But the protagonist, Zhou Yu, has heaven-defying luck and awakens the highest-tier profession of all: Forbidden Spell Mage, along with the talent of infinite lifespan. From then on, he soars to the top!