During Blacksmith's campaign to take over the Twin Cities, the rogue Plunder shot Chunk with the only thing that could hurt him, a bullet laced with White Dwarf Matter (the substance Atom uses to shrink). The bullet wound opened up a vortex within his body, which sucked in everything around him, including people and light.
During Blacksmith's campaign to take over the Twin Cities, the rogue Plunder used a bullet made of White Dwarf Matter (the substance Atom uses to shrink) to injure Chunk. This resulted in a vortex forming within Chunk that consumed everything around him, including people and light.