The Rise of the Irregular Mage

In a world where Magic exists and each one can have multiple spells from different elements then having the highest rank is deemed the highest form of a human being. However, there is one particular thing that they considered the lowest and weakest. For them, it is a shameful curse that nobody would want to be one of them. The "one spell users." Deianira Achlys Strahd is a one-spell user, a level-one mage, a slave, and an unwanted wife. Now she has the chance to change, but will she make it?