Jack Spheer, CEO of Biospheer Technologies, developed a plasma called the Biomax Process that could control organic tissue. He intended to revolutionize the food growth industry using this substance. When people started getting sick from his additives, he was confronted by Black Canary and Green Arrow. During the struggle, he was accidentally pushed into a vat of his own creation, becoming Biomax.
Biomax is a sentient form of the Biomax Process and has mind control abilities and no physical body.