You miss the point. Oreb, the prodigal master of Necromancy, who was even consulted by Moia during the Succession quest, comes from and learned his craft from a world without any knowledge of Runes of any variety.
During the quest we find "magical residue" which Adrasteia examines:
"Hmm, this seems to be the lingering residue of some powerful magic.
Not normal rune magic either
."
In the Library, we see information about Necromancy as well, and in the same vein we find they are researching it alongside the Soul Sorcery and the Corruption.
Nothing about any of this should make anyone think that runes are going to be at the core of Necromancy. Even if someone were to suggest that Soul Runes would be used, Adrasteia says in the Soul Altar portion:
"I'm not keen on anyone dealing with something like that. I know soul runes aren't actually stolen human souls, but still, unpleasant."
08-Jan-2023 05:01:43