Deathstorm eventually brought the White Lantern Battery to him, and he tried to access the White Lantern power, however his efforts are prevented by Firestorm who after engaging in battle with the Anti-Monitor and the Black Lanterns is able to regain the White Power Battery from the Anti-Monitor.
The Anti-Monitor was introduced in The New 52 (a reboot of the DC Comics universe) in the final page of the Forever Evil storyline.