Arch-Demons

Arch-Demons are a more advanced, stronger and in general better version of the average demon. And as such, they're more rare than normal demons and can't be conjured under normal circumstances.

History
After the great war that happened, the veterans have been given a blessing from the 5 original demons, some were the lower populated conjured demons, who decided to fight against their non-demonic overlords. One of them then opened a gate to Rathnir, where he started a life in prosperety and fame (definetly not Lukas Lordinger).

Rathnir and Eldham
After the arrival of Lukas Lordinger in Rathnir, others came there too and started to live beneath the people. No real big event against Demons happened yet and there hopefully never be one.