From publisher blurb:
The Gereza Maximum Security Penitentiary, better known as the Black Box, holds prisoners too powerful and too dangerous to be held anywhere else. Given the nature of super-powered beings (SPBs) and the wide potential of powers they possess, the Black Box must treat each inmate as a unique challenge. This means the prison must deal with powers such as superhuman strength, the ability to walk through walls, teleportation, mind control, or the ability to shrink to microscopic size.
In some cases, an inmate’s powers prove especially difficult to contain, such as when they pose a hazard to everyone within the penitentiary. Containing such inmates requires special handling and endless precautions.
Two such inmates include Jamie Winters (AKA Atomix) and Winston Clark (AKA Biohazard). In both cases, these prisoners possess abilities capable of harming or killing people nearby. Even delivering a meal or giving medical care to either of these prisoners could prove lethal to staff and other inmates. Although their powers originate from different sources and manifest in different ways, they represent similar challenges to the Black Box facility and its occupants. Both Winters and Clark risk hurting other people whether they mean to or not.
This PDF contains everything you need to know about Atomix & Biohazard in the Amazing Universe Campaign or any other superhero campaign.