The Psychplug is an add-on for the PsiCorpsPandora Hub, which grants the proselyte full access to the PsiCorps' arsenal.
These upgrades, unique to every Epsilon subfaction, grant them a full technology access and a variety of support powers based on their own research. Upgrading the Pandora Hub to acquire the complete weapons array and accompanying support powers can give an Epsilon Proselyte the edge he needs to overcome his enemies in battle. PsiCorps owns a Psychpug[sic], Scorpion Cell has a Chemplug and Epsilon HQ uses a Geneplug.
Other than unlocking the full potential of PsiCorps' anti-gravitic, magnetic and mind-control technology, the Psychplug provides the following support powers:
3 Libra Clones can be called forth anywhere on the battlefield via Dybbuk-Transport. These inferior clones of Libra serve as diversions to the prime Libra and cannot use her gravity field. This reinforcement power costs $1200 and takes 4:30 to recharge.
PsiCorps proselytes are able to deploy a powerful and controllable magnetic beam from an unidentified object in space that slows and immobilizes vehicles and infantry vulnerable to magnetic weapons such as Siege Cadres. Magnetic Beam has no cost but takes 7:30 to recharge.
Psychplug debuts in Memory Dealer, but is not available to build due to the Pandora Hub is not buildable. It only unlocks Mastermind and Cloning Vats in this mission.