From Levi's point of view, the legendary realm was a realm where mortals could not accurately understand the realm of legendary knights, so they used the vague and inaccurate word "legendary" to describe the realm of knights. As long as a knight's strength reached the peak of the Maximum of mortal knowledge, they would be labeled as "legendary", similar to the "grandmaster" in Wuxia novels.
In fact, it was the same for wizards. For the strongest wizards who had surpassed the ninth circle, they were collectively called "Legendary Wizards".
However, there were definitely different differences between Legendary Wizards. It was just that there were too few Legendary wizards now, so it was impossible to form an effective regional ratio.