Before reading this be aware that this was written fairly quickly. Grammar and spelling are probably off. I was just trying to come up with some coherent history for my city. I have had a few ideas, this one is one of the better ones, though I do need to change some things I'm not 100% happy with. Thanks for reading!

(this picture was found on google and is not an actual representation of Corinon)

Church teaches about honesty and morals, but people keep fighting each other with their magics. Eventually it’s decided that the best way to stop fighting is to take away their weapons, magic. The church figured out how magic is held in the body, and develop techniques of how to remove it. It is discovered that magic is like a blood. It’s an energy that flows through the body, and like blood it it held in the body by a skin, but not physical skin, a magical barrier. This barrier is weaker at birth, but quickly strengthens, so the techniques to remove the magic is done at birth, where it is easiest to remove the barrier. Without the barrier, the magic is free to flow out of the body.

The church elders soon start using these techniques during the baptism, which was always performed, so was never questioned. Children stopped developing magic, and slowly, generation by generation, magic was disappearing. But it was quickly discovered that there method wasn’t foolproof.

Sometimes the magic didn’t naturally flow out of the body, and still developed at puberty, but for some reason the magic wasn’t what it used to be, each childs magic was different, not inherited as it used to be. The church didn’t know why, they didn’t really care, the kids with magic started causing havoc. They needed to be taken out of society.

The church started testing children at puberty to see if the magic was still in them, as that was the only time that the magic developed enough to be recognisable. The church never discovered how to remove the magic after it developed, and they couldn’t let them back into society. And they couldnt figure out how to make the baptism process fullproof. But they did discover how to stop their ‘problem’. By torturing the mind of the kids, they were able to remove the childs personality, their individuality.

It was found that by removing personality the magic within changed too. Instead of the advanced magics of before, the magic turned into its basic form, enhancing basic human attributes, strength, agility, resilience, and perception. What was left after this ‘treatment’ was a mindless ‘zombie’ that the church had full control over, with superhuman traits.

After removing a kids personality it was impossible to return them to their families, so they had to come up with a cover story. They started training them and using them to expand their city. Slowly this became an army. They were given the name Giants, as they were so strong and tough.

History had lost all trace of magic, and people forgot about it. The church made a story to cover their lies:People had potential to become a giant, this potential is checked by the church when a child reaches puberty and if they were successful (they had magic) they would undergo training (depersonalisation) within the church, and serve the church for the rest of their days, meaning they lose their family ties, and distractions. This was an honor that only few would receive, and is longed for by many children in the city.