Posts from Mod requests (orders).
Are you sure that this is even possible?
I think that somewhere there must be information about which creatures can use runes/artifacts, maybe in the characteristics of the creatures themselves (although I looked in GameMechanics\Creature\Creatures\ and it's not there, but maybe it's somewhere else), or in the characteristics of the runes and mini-artifacts, or in the abilities of "Rune Priest," "Artifact Creator," or somewhere else like that. For example, in DefaultStats, it is written which artifacts a hero needs to collect to receive a group effect, or from whom and what kind of undead a necromancer can raise.
Блистает там воздушностью прогалин.
Но между кедров, полных тишиной,
Расщелина по склону ниспадала.
О, никогда под бледною луной
Так пышен не был тот уют лесной...
As far as I know, nothing will be released because it's hardcoded into the executable (just like the defensive and offensive guard skills are only available to units from the Fortress faction, and the Forest Fury skill is only available to units from the Sylvan faction).
https://vk.com/doc164714852_431718101?hash=5e2001aa12c1d1fb84&dl=810ba300305fb986e3
ColouredText - список заклинаний и их уровень в описании существ-колдунов