Board Thread:The Last Sovereign Discussion/@comment-27713488-20170707041037/@comment-32166397-20170801174953

Seeing as how The Incubus King's Domain is a corrupted hellhole, but Simon's presence in Yhilin hasn't made it corrupted, I'm guessing that just using the powers of an Incubus King doesn't automatically spew corruption like a firehose. Maybe it's how you use them, more corruption is made if you use them recklessly and if you actually try to control yourself you don't make a whole lot.

With succubi they are immune to corruption energy and I think they can use corruption, but not like an Incubus King can. The second of the original Seeds of Corruption that Simon encounters was able to be absorbed by him, but they were made specifically by Iris. The one in front of Ari-Yhilin he wasn't able to because The Incubus King infused it with his own energy. So it seems like succubi can at least shape corruption energy.