No one truly knows if The Iratus are a species of their own or something else entirely.
They have no home planet of their own, seeming to naturally inhabit every planet in the universe as if it were their own. They spread, like a virus or a disease, and no matter how many of them are killed, more always seem to spring up in their place.
They are the most feared beings in the universe, known for their cruelty and lack of concern for anyone, including their own kind. They experiment, torture, and even kill with no remorse and are willing to do anything for the advancement of their own science and studies. No one has ever seen any member of The Iratus show mercy, and many do not live to tell about their encounter.
Rumor has it that they are shadows that escaped.