The viper is a unit in StarCraft II: Heart of the Swarm. The concept of the viper goes as far back as 2008. It resembled a snake/scorpion in this form. Concepts were done by Samwise Didier. Its current aesthetic is a cross between a cobra/scorpion and a wasp. As of April 2012, the viper could also "eat" minerals in order to recover energy. This renders the patch unavailable, so it should not be used in the player's base.