The sixteenth episode, Desecrated Cathedral and Oa Under Siege, was released on September 2, 2015 for members, and September 9th, 2015 for non-members. The episode revolved around players defending OA as it faced a new threat from the Black Lantern Corps, and a new storyline with DC hero Raven. Some of the core features of this episode include one Tier 7 Alert in Desecrated Cathedral and one Tier 7 Challenge in Oa Under Siege.