The world is full of magic. The more a person uses the magic the stronger the person becomes. But some are born with special talents and some are not. Those who they are not born with talent they are protected by the, strong knight of the Kingdom
Using magic a person can contol any non living thing they want. They can even control elements like fire and water. However, it requires mana.
An exceptional knight can even make magic a physical substance which cannot be seen
In the world people are ranked according to magic-The ranking is from E, D,C,BA and finally S.
Those who doesn't have magical powers, for them magical tools are are created protecting them These tools are ranked ind the similar way as people are. The higher the rank the more the price.