Lifespan
In this world, the progress in stages didn't directly relate to one's lifespan being increased. If one wanted to extend their lifespan in this world, they needed to acquire spells designed for that purpose; the wizard's rank didn't matter in increasing their lifespan.
The lifespan spells were all kept as a secret by the village and were only given to people who accomplished something significant for the village.
"Remember, Aur, don't be a fool like us and overexert yourself," Adam said with a sigh on his face.
"How did this happen? That you lost your lifespan," Aur asked expressionless.
"Do you really need to hear the story?" Evelyn said tentatively.
"Yes," Aur's tone became cold.
Evelyn shook her head with a sigh, while Adam started to elaborate on the whole story.