A Knight is an existence that transcends ordinary human life. Once one becomes a Knight, they are completely free from common diseases, and their lifespan is extended to a certain degree. In Sigerno City, it's rare to see an elderly person over fifty; if there are any, they are nobles or wealthy merchants adept at self-care. Ordinary people find it difficult to live long lives, especially in an age lacking doctors and medicine, where a common cold or an infection can be fatal. However, a Knight, unless they die in battle, can generally live past eighty years old, which is several decades longer than an ordinary person.
To become a Knight, a Life Potion is indispensable. Acquiring a Life Potion in Sigerno City is exceedingly difficult. It not only requires strength but also a certain background; a loner would find it hard to even begin looking for a way. Currently, Carl has seen no hope in this regard.