Viper

The Viper is a reptilian alien that appears in the turn-based strategy game XCOM 2. These creatures seem to resemble a cross between a human and a cobra, having a distinctly feminine humanoid torso attached to a long, serpentine lower body. Through the use of genetic alteration technology, Vipers were able to take on human form, appearing as the gaunt "Thin Men" during the aliens' original invasion. Since the Elders' conquest of Earth, they have used the Faceless to infiltrate the human resistance, relegating the Vipers to ADVENT support units.

Description
Though they disguised themselves as male humans during the invasion, Vipers are actually an all-female species. Their humanoid torsos appear to be distinctly feminine: slender, curvaceous and sporting a pair of breasts. Their lower bodies are akin to those of snakes, everything from below the hips being a long, scaly tail. The head of a Viper resembles that of a cobra, sporting scaled flaps on either side of the neck.

Vipers are normally encountered backing up ADVENT Troopers. They are equipped with light plasma rifles and are highly accurate as well as evasive. In addition to these qualities, Vipers also have exceedingly long tongues which they can use to lash at and pull in distant human targets. A common Viper tactic is to wrap its body around a victim, slowly crushing the life out of them. The binding Viper will only let go of a victim if it gets hit by an enemy attack or if the bound victim dies. As with the Thin Men, Vipers can also spit globules of poison that saturate an area with toxic vapour.