Prelude
The death of a radiant knight on the battlefield was no less shocking to the witcher-knight army than a massive earthquake.
There hadn't been a single record of a radiant knight dying on the battlefield in nearly a thousand years. Of course, this had to do with the fact that heretic casters in this plane were much weaker than the radiant knights, as well as the radiant knights' own strength.
Without the accumulation of knowledge nor the legacy of a proper system, the naturally awakened heretics had powerful talent and enviable development potential, but no place to systematically learn arcane knowledge or learn to apply their powers. Moreover, under the strict suppression of the witcher-knights, they were forced to hide their names and hide every time their identities were exposed, living a life fleeing and being homeless.