"And behold, I shall be a blight upon the land, and everything I touch shall wither and die." - Blight
Derek Powers was a wealthy businessman. After years of bidding, his company, Powers Technology, merged with Wayne Industries. Wayne was now an old man, and took little interest in day-to-day operations. In the mean time, Powers shifted the company into shady waters. Despite a weapons embargo, he set up a deal for a dangerous nerve gas with Kaznia. An employee, Harry Tully, found out and passed the information along to his co-worker, Warren McGinnis. Tully later died from exposure to the nerve gas.
Desperate to retrieve the information, Powers set his assistant Mr. Fixx to kill McGinnis and make it appear the latter was the victim of the Jokerz gang. However, Fixx did not obtain the disc of information, which had been earlier found by Warren's son Terry. Terry gave the disc to Bruce Wayne, whom Terry discovered was once Batman. Terry would take up the guise of Batman to avenge his father's death.
In the confrontation with Batman, Powers was exposed to the nerve gas himself. In order to fight the effects, he underwent a nuclear radiation therapy that had a side effect in that it gave his skin and muscles a toxic green color. He would mask this appearance with a special synthetic skin.
The radiation took its effect, and after the "Blight" side of his powers was exposed, he went into hiding. Only his assistant, Miss Winston, knew of his whereabouts - Powers hid in an old nuclear sub that would conceal his own radiation. After following her, Batman fought Blight and the submarine sank in the ensuing battle. Blight's body was never found. It would be more than a year before Blight resurfaced, revealing his mutated state had eliminated any need for food, sleep, or even oxygen. His increasing energy levels finally allowed him to burn his way free and make his way back to shore, only for him to discover he was growing increasingly unstable and his body beginning to lose cohesion. He sought out one of his old doctors, who he coerced into making him a special containment suit. Blight, growing increasingly insane, attempted to ruin Wayne Enterprises so he could buy controlling interest in the stocks cheaply, but his actions once again drew Batman's attention. In the ensuing battle, Blight's containment suit was damaged. Unsure whether or not the slime leaking from the suit could still be called "alive", a HAZMAT team gathered the slime in a radiation-proof container and took it to a lab for further testing.