When Omega comes under attack from Reaper creatures called Adjutants that broke free from Cerberus's research bases beyond the Omega 4 Relay, the Elbrus is dispatched in advance of a Cerberus fleet to aid Aria T'Loak in eliminating the threat. The ship makes quick work of the unarmed transport vessels that the Adjutants had hijacked to reach the station. It also leads the defense of Omega from a second wave of armed Adjutant ships. The sheer number of attackers overwhelm the Elbrus, however, forcing General Petrovsky to take it through the Omega 4 Relay to prevent it from being destroyed and to stop the Adjutants at their source: Avernus Station.