Decepticon Viper was released carded in the Transformers: Combiner Wars toy line in 2015. A retool of the 2015 Autobot Powerglide, Decepticon Viper transformed from
a robot to a jet resembling a Cobra Rattler, complete with a merged Cobra and Decepticon emblem. A third mode allowed Decepticon Viper to transform into a gun that could be held by other Transformers.
Decepticon Viper is intended it be a "generic" Transformer - meaning that there would be multiple identical Vipers. This means that Viper is also a troop builder!