As Barry chases after Thawne, Wally joins Barry in the time barrier. The two Flashes reach Thawne and in doing so, they become the lightning bolt that turns Barry into a speedster as they are able to stop Thawne from killing Iris. The two Flashes push Thawne back through time, showing his past and future while the two return to the present, where the Justice League, the Justice Society, and the Outsiders have built a device originally intended to disconnect Barry from the Speed Force as the Black Flash. Barry tosses Thawne in and Jay activates the device, severing his connection to the negative Speed Force. As the Flashes tie him up to stop him from running, Iris discovers Thawne's weapon back in the past, which Iris keeps.