The Näv Kingdom where I lived was one of the largest nations on the continent.
It iwas said that the country began with the Great Saint, and that her descendants founded the royal family.
According to legend, the great saint sealed away the Demon King who was filling the world with fear at the time, and married the hero who defeated him alongside her, and their children went on to rule the country for generations.
...But that's a complete lie.
The power of the saint was the power of healing.
It is said that it could instantly heal any wound, replenish any defects, and even cure illnesses.
However, as 100 years passed, and then 200 years, the saint's power gradually weakened.
Originally, there were many saints across the continent.
Therefore, the royal family maintained the power of the saint by marrying women who had a strong influence of the saint. The same went for the nobles. This was because it was known that the power of the saint would be passed down to the next generation more easily than magical power.
The power of the saint was a precious thing that guided the country's beginnings and kept it in peace, so it was treasured and considered of utmost importance that it be passed on to the next generation.
There are also practical issues.
When fighting monsters or enemy countries.
The situation on the battlefield could change drastically depending on whether or not there was someone who could use healing magic.
Only saints could use this precious healing magic.
And yet, the number of saints was steadily decreasing.
Although children who could use offensive magic were rare, a certain number of them were born, but saints who could use healing magic were almost never born.
Because of this, saints were protected by the state, gathered in churches, taught about their powers, and trained in how to use them.
She was inundated with proposals from nobles and was engaged to be married at a young age. Even if she was of commoner origin, as long as she had the power of the saint, she could become a member of the nobility.
Due to their small numbers, there were no more saints who acted as adventurer, and everyone belonged to the kingdom. During normal times, they spent their time creating healing potions and accompanied the knights when they went out to a battle. They were protected and worshipped by the knights.
Wherever they appeared, they were revered as "Saint, Saint" and treated with the highest hospitality.
Because of this, saints began to believe that they were the chosen ones and became conceited and arrogant.