Not much is mentioned about Erik, but he’s referred to as the Magneto Specimen. It’s also said that together, he and Charles Xavier could have "controlled the world," and their powers seemed ...

And just what happened to both Charles Xavier and Jean ... I had read the files concerning the Xavier specimen and found them to be captivating. Between Erik Eisenhardt—the so-called Magneto ...

That’s where we see Jean Grey tethered inside the massive Cerebro facility, dangling in the air below a brain that we learn used to belong to Professor Charles Xavier, founder of the X-Men.