Despite being such a wonderous and useful substance, Imulsion did have its disadvantages. Being exposed to Imulsion for too long would cause Rust Lung in the human body. To a Locust,
it would mutate the species into a Lambent form.
However, unbeknownst to many of the COG and Locust alike, there are some humans that survived direct Imulsion exposure. One might even say that they had evolved into a totally new species.
The renowned Adam Fenix had been alerted to this, and he began researching these humans, mostly patients in hospitals. He was terrified with the results.
Indeed, these humans were no longer human. Imulsion coursed within their very blood, and enhanced their senses beyond anything scientists could ever conceive. They had a sixth-sense , "Oracle" as Adam had named it. Each of them also possessed a supernatural gift, ranging from a simple boost to one's immune system to razor-edged Imulsion claws. Adam Fenix dubbed these people.... "Lambent Souls".
The COG was quick to take advantage of the Souls, and a black-division was formed: The Rift of Souls. It was only after Emergence Day that the Rift's warriors were put into effect.
The Locust Queen has noticed the Souls' existence, and she suspects that they could be the end to the line between reality and the unimanginable.