....

i have a feeling that either mc or ml are actually powerful beings that are from the heavens, without their memories, or probably thrown down from the heavens as a punishment. (leaning more towards the ml being a prince of heaven, since the general's by his side, but i think mc is also a powerful being, considering he has his spirit, donga)

but if you search this online in the summary it says that mc is called "prince among shamans" so this could be connected

oh, I see. thank you for telling me. (●'◡'●)ﾉ that means, it is still not explain in manga. I thought I'm missing some lines.