Hyperion

The Mark 1 Prototype Hyperion is a plasma cannon augmentation used by Viktor Marchenko. The augmentation is concealed within Marchenko's right arm. Upon activation, Marchenko's skin-like plating and prosthetic hand fall away, revealing the weapon and allowing it to be fired. The weapon is capable of devastating damage, either by a direct hit or catching its target in a small explosion once its plasma bolt strikes a hard surface. It can be fired in two modes: a slower but more powerful charged shot or machine gun like rapid fire. It is powered by a nuclear battery produced by Kubotchi.

Trivia

 * Hyperion was a mythological Greek Titan of light and father to Helios, god of the sun.