Agony Matrix
From DC Animated Universe Wiki, the DCAU Database
The Agony Matrix was an energy-field-based weapon that Darkseid used against Superman during the invasion of Earth by Apokolips.
The weapon utilized, as Darkseid said, direct neural stimulation of every pain receptor in a person, causing unfathomable torture. Superman managed to live through the brutal attack only because of his superhuman attributes and his will. It was almost a certainty that a normal being would have succumbed to the intense pain immediately and died. Darkseid even remarked that Superman impressed him with his resilience as Superman laid on the ground writhing in pain.
It is possible that this new ability of Darkseid's was made possible by his fusion of Brainiac technology with his body as it had never been seen before.
