Xeoz
Here's a theory : Our MC doesn't have any mana. Irene said the void contains nothing. So is there a possibility that MC has a connection with the void. Maybe his spirit will allow him to use power of the void.
Nice to read more details about the spirits and mana theories. However we don't know anything about the political situation - factions, geography, religion, wars etc. Also info about mage/warrior ranks. Hope MC gets more info sometime. And I still feel Irene is very sus - especially if this is some law of the jungle cultivation/mana world đ¤