Croit was experimenting with Darkforce, a form of unstable and powerful cosmic radiation made of pure negative energy, in an attempt to harness its electrical power. During one of the experiments, a lab accident subjected Croit's assistant Marcus Daniels to the Darkforce and granted Daniels the power to absorb any form of energy.
- Marcus Daniels - Assistant
- In the comics, Abner Croit was a researcher investigating the Darkforce and Marcus Daniels' employer. He wanted to help Daniels following the accident that transformed him into a conduit of the Darkforce, but Daniels ended up killing him.