Jia Jem Wearing Costume From Mass Effect 2

The Illusive Man contacts Shepard again after intercepting a turian emergency transmission, claiming a turian battle group engaged and disabled a Collector ship before being destroyed. Believing valuable information could be learned from the Collector ship, Shepard and his team locate the ship. Inside the ship, Shepard learns that the Collectors were originally captured Protheans that were indoctrinated and genetically altered to become slaves of the Reapers. The Collectors that Shepard has encountered are under the direct control of a Reaper named Harbinger. With EDI's help, Shepard locates information on how to bypass the Omega-4 relay, but the derelict ship turns out to be a Collector trap, and Shepard and his team are forced to battle back to the shuttle and escape before the Collectors can destroy the Normandy. EDI also determines that the Illusive Man knew the signal was a trap but dispatched Shepard to the collector ship in order to gain more information about them. When questioned about this, the Illusive Man argues the deception was necessary in order for the Collectors to believe they had the upper hand and that alerting Shepard to this could have tipped off the Collectors.
Later on the Normandy, the Illusive Man reveals that the Omega-4 relay - beyond which lies the Collector base - requires Reaper technology for the Normandy to safely navigate through it. Cerberus has located a derelict Reaper, disabled millions of years beforehand, and has sent a science team to recover the device - an IFF transponder. Upon boarding the ship, the derelict vessel puts up kinetic barriers preventing the team from departing the ship. Shepard later discovers that the Cerberus science team members have been killed and transformed into Husks. While battling through swarms of husks, Shepard encounters a friendly geth that saves Shepard from an ambush by several husks. Shepard later recovers the IFF and salvages the geth which is attacked and disabled by the husks. In order to escape the ship, Shepard destroys the reaper's Mass Effect core taking down the kinetic barriers but also destroying the ship. Shepard may turn the geth over to Cerberus or activate it. If activated, the geth adopts the name Legion and joins the team.