Many years ago, when I was trying to come up with a villain for what I called, at the time, Earth Space Wars, I wanted an enemy that was brutal, ruthless and most importantly, inhuman. An enemy that would look at our system of ethics, morals and honor and laugh at them as being hopelessly naïve and primitive.
Below are images of the Drengin over the years.

Early Drengin image from early 90s.

Drengin painting from 1995

Lord Kona, Galactic Civilizations I

Lord Kona, a few years later in Galactic Civilizations II

Early GalCiv III version of Kona where he was blended with Korath concepts.

Elderly Kona