it. Mason is killed while attempting to save Kamille, and Delta Squad is forced to retreat with Brood. Brood leads Delta Squad to his hidden ship to repay his debt to Vega. As the group lifts off aboard Brood's ship, the Praetorian emerges and gives chase, killing Nicky before perishing. Vega orders a frontal assault on the Collector ship and successfully boards it. However, Messner kills Brood, leading to Delta Squad's capture. Now in orbit, the Collector ship incinerates the remains of the colony to cover their tracks. Deep within the ship, Messner explains to Treeya that he was the one who planted the alien device in order to lure the Collectors and capture their technology for Cerberus's benefit. He takes Treeya with him to another part of the ship, leaving Vega, Essex, and Milque locked in pods. Unbeknownst to Messner or the Collectors, a drink Vega had given everyone earlier had been spiked with the Seeker Swarm antidote, and the three are able to escape and kill their guards. Vega and Essex pursue Messner and Treeya, while Milque secures transport for their escape. Elsewhere, Messner shows Treeya a Prothean archive built into the Collector ship and has her access it. Treeya witnesses footage of the Protheans' last stand against the Reapers, their transformation into the Collectors, and the Collectors' construction of a human-shaped Reaper at their homeworld. Messner records this information on his bracelet, only to be double-crossed by the Collectors. When Messner tries to bargain with the Collectors, Treeya steals the bracelet before escaping in a containment pod. Vega and Essex fight the Collectors, killing them and damaging the Collector ship's controls. Essex is impaled by the claw of the ship's pilot and uses his biotics to fling them both into a chasm, where they fall to their deaths. Messner fires on Vega, but Vega disarms and stabs him. Vega demands Messner's intel on the Collectors and learns of Treeya's possession of it. Left between the choice of evacuating the colonists on a now-pilotless ship or saving Treeya and the Collector intel, Vega chooses the latter. As Treeya's pod is retrieved, the Collector ship crashes into Fehl Prime's surface and explodes, killing Captain Toni and the colonists, leaving Vega, Milque, and Treeya as the only survivors of the massacre. On the Citadel, Vega is commended by David Anderson and Admiral Hackett, who inform him that the intel he