*Chris looks over at Colton*
"They are like parasites, attaching to someone who has a above normal corruption, at first it can only attach itself to humans, then eventually after feeding on that corruption it takes over the host.
*Chris sits down*
"However if the corruption isn't powerful enough then the host becomes 'a soulless' as we call them, it's kinda like a zombie, only very powerfully corrupted people become Shades, and then that person body changes and can merge with machines if they choose to."
*Chris lays down*
"As to how they were made, someone was trying to artificially create the 'Soul 0' trait. But it went terribly wrong."