Black Dragon Vipers are selected from the Viper ranks. When the regular Vipers have finished their basic
training, the few ones who stand out are immediately picked by the Black Dragon Leader so they can undergo advanced Black Dragon combat training. This involves a far more specific focus on espionage, demolitions, martial arts and infantry tactics at a more intense level than the regular Vipers and Troopers experience. Naturally, it also leads to a higher than usual drop out rate, but the Black Dragon Leader only wants men who are suitable for his high risk operations.

Just a repaint of the Sonic Viper. I always wanted to make a Viper in the Black Dragon colour scheme.