Viper

The true form of the Thin Men encountered during the First Invasion, the Vipers are reptilian aliens that are predominantly female in appearance. Having shed their infiltration protocols, they now act as support and **** units.

Unlike a majority of ADVENT forces, they do not rely on weaponry or tech in battle. Instead, they utilize their species' natural abilities to attack their foes. Their snake-like figure gives them an advantage in combat, able to swiftly move across the battlefield almost undetected. What's more, it allows them to constrict XCOM operatives and bind them down. Their venom is also capable of poisoning, inducing hallucinogenic episodes, and rarely cases of **** lust. The most disturbing reports, however, are of the matter of their sexual organs. Contrary to their feminine physique, they possess not one, but two phalluses. Operatives are warned to not engage these aliens without support, as they have been known to subjugate their prey by means of double penetration, or singular on two victims.