Darkforce

Darkforce is a form of unstable and powerfull cosmic radiation made of pure negative energy.

History
Dr. Abner Croit and his assistant Marcus Daniels were the scientists behind an experiment to heighten the electrical power of the Darkforce. During a lab accident the Darkforce granted Daniels the power to absorb any form of energy, empowering himself. This allowed him to manipulate brain and heart electrical impulses, killing his victims with just one touch.

After Agent Phil Coulson imprisoned Marcus Daniels at the Fridge, S.H.I.E.L.D. scientists performed experiments on him that strengthen his power over the Darkforce.