Kogaios, as the mate came to call the form while working on it. Kogie is interbred of demon and angel, and has the powers of both, and the consequences of those powers.
A very few number of times in CoE, Kogie ends up in this form, totally demon and all his angelic attributes buried into his soul. This is the form his High Incubus father gave him through his genetics. Entirely driven by the darker instincts of mostly wrath and only a hint of lust, Kogaios is a weapon for hell that attacks anything that upsets or angers him for any reason at any level.
The demonic power darkens and sharpens his wings into weightless razors, his fur to a dark grey, and even his spots snap apart into pseudo stripes as his body grows to the ten-foot tall archdemon. Being that he doesn't let many near him, unless someone he's let close can stop him before changing he has the potential to become this evil mutation of himself.
In CoE, the only reason he comes down from this form is nearly killing his mate before even able to realize who's forced into fighting him.
