The Pain Is Stored and Returned a Hundredfold!

In this world forged by gods, magic and pain come from the same source. The noble mages chant dazzling spells, but we bear the cost. My name is Linton, and I was born as a "pain bearer". My flesh and blood is the shield of the noble mages; my wail is the music for their promotion. Day after day, I stood on the cold stone platform, enduring the magical backlash that burned their bones and eroded their hearts for them. Until that day, I took on a forbidden spell for a genius mage. The body was almost broken, but the soul was extremely clear. I was shocked to realize that the pain that was enough to make me die ten thousand times did not disappear, but was perfectly stored by me. Now, I'm awake. All the suffering I have endured will turn into my strength. The sting of whipping? Give it back to you! Soul-burning demonic flames? Burn it back! That devastating taboo backlash? Come and have a taste of one percent! Noble gentlemen, please use your painless magic. Because every bit of pain you inflict on me, I will return it a hundred times!