Korgrath are most commonly massive humanoids, though there is much variation. They have a wiry strength which enables them to be far stronger than other animals.
Often, they have technological abilities.
They all have bat-like wings and black, ashen scales.
Psychology
More intelligent than Grakk, Korgrath still are not imaginative, so rely on Gehennians for orders and guidance.
Often trusted with Warbeasts, Korgrath seem to enjoy ordering them around.
Subspecies
In addition to the standard Korgrath, there are other varieties.