After much contemplation, Levi did not choose to continue waiting nine hundred years to advance the "Knight's Sword". Instead, he used the wizard's method of refinement to refine this oddity.
After the refinement, his spiritual force and its upper limit both increased by 10 points, an unexpected joy.
Now, his spiritual force's upper limit had reached 1750 points, only 250 points away from the 2000 point threshold of the primordial soul.
This oddity further optimized Levi's metal talent "Golden Dragon Break".
Beyond that, there were no other functions.
Such oddities, if refined using the methods of Arthur's world, would yield entirely different effects from those of a wizard.
As a dual practitioner of wizard and knight, Levi wanted to try, should another oddity arise in the future, whether he could once again use Arthur's method to refine the "Sword of Dust People".
...
Month of Northern Wind.
Hell Realm.
Howling Wilderness.
Undead Festival.