Knight Terrors has already been a devastating turn for the DC Universe, as Insomnia brings almost every major hero and villain in the world to their knees. This has left most of the world's heroes unavailable to help the few who avoided these effects. But things have gotten even worse, thanks to the abilities of one of the event's most dangerous elements.
Source:https://www.cbr.com/knight-terrors-robotman-sleepless-knight-dc-comics/