The Orkoid races are believed to have been genetically engineered millenia ago. Ork legend attributes their creation to the Brain Boyz, a diminutive but extremely intelligent subspecies of Orkoid, who bred the Gretchin to be servants and the Orks to be warriors.

Later evidence establishes that the Ork races may have in fact been created by the Old Ones, who are described as creating the Krork as part of a last-ditch attempt to fight off their enemies such as the Necrons and Enslavers.

The Brain Boyz are believed to be an ancient subspecies of Greenskins that are related to the Orks and were believed to be a master or ruling caste of their kind who shared a similar physique with their cousin species.

From cracks in reality, the denizens of the warp sought entry into the material universe which forced the Old Ones to bring about the emergence of new species to defend their last strongholds. Among their creations included the green-skinned, hardy Krork and the technology-mimicking Jokaero.

There are two theories relating to why Orks have such a unique biology. The first is that they were adapted by their masters the Snotlings, a race that soared to intelligence upon eating a particular species of mushroom, spread across the galaxy with the help of their less intelligent Ork slaves, and were then deemed stupid again when the Orks consumed all traces of the mushroom which only grew on their home planet.

The more modern one is that they are the Krork, created as a survivor race by the Old Ones (referred to in Ork legend as the Brain Boyz) in their wars against the Necrontyr. The fact that an entire ecosystem can be constructed of Orkoids, and their total war-readiness, suggests that this is the more likely of the two. In early forms of this theory, the Brain Boyz were an Orkoid subspecies, along with Orks, Squigs, and Gretchin.

The exact nature of the Snotlings is the subject of some controversy. Ork legend tells of a lost race of Orkoids that were highly intelligent, called the "Brainboyz" by the Orks. The Brainboyz created the other Orkoid species as a means of protection, while at the same time directing Greenskin society. What happened next is unknown. Some legends indicate the Brainboyz died out during a great plague (giving the implication that the Brainboyz were really the Old Ones). Other legends indicate that the Brainboyz reverted into the Snotlings.

In the deep-space radio-frequency inspection suite of the Ordo Xenos:
The acolyte in charge of the scanning equipment picked up a weak signal that, at first, appeared to come from Mars; but was found to have been bounced through many systems on many allied planets before being directed at Terra. After scans and checks for safety of the signal itself, a recording was sent to the Inquisitor-in-charge for assessment. This is what he saw:

The signal was decoded into a video format and the initial frames showed one end of a room with wooden panelling on the walls, some metal filing cabinets that look like a guardsman had spent 15 minutes introducing it to the blunt end of his Lasgun, and two pictures on the wall. One picture showed an underwater photograph of a large water-bound mammal seemingly minding it's own business. The other was a painting that showed, in the lower left corner of the canvas, a beautiful woman standing at a fence-like structure that came up to her hip and in the background, a huge battle scene complete with large explosions, tanks, troops and blood and gore where possible; this was clearly the focus for the painter and took up the majority of the space in the picture's frame. In front of all this was a desk made of a dark, red-ish, wood. The desk was clearly well used, but well loved, as it was highly polished but worn at the edges. On top of the desk were untidy piles of paper a few test-tubes in a rack containing various liquids of differing colours, writing equipment and various clutter including a bowl with a plant in it. The plant was in flower and was displaying small, bright, flowers of many colours.

As the Inquisitor regarded this view a figure walked into the scene and seated himself at the desk. This person was wearing a white lab-coat with many tools and pieces of equipment hanging out the pockets, opening the lab-coat to sit down he revealed that he was wearing a brightly coloured shirt underneath and khaki shorts with extra pockets (also bulging with tools etc...). On his head, the person was wearing a very badly made mask of a man's face with wild grey hair. After sitting at the desk for a short while, the figure held up a sign on a stick that had been laying on the desk, which said "Allow me to make myself more comfortable?", the question mark was emphasized. The figure threw the sign over his shoulder and pulled the mask off his head to reveal that his face looked exactly like that which the mask had been representing badly, the figure smiled widely and addressed the camera...

"Hello. If my calculations are correct you should be reading this at 15:34 local time, if not, your clock is wrong or your subordinate is not working hard enough. Ha Ha."
The Inquisitor glanced at a clock in his office and it read 15:35, he frowned.
"I'm sending you this message to inform you of what is wrong with the Universe. You may think that this Galaxy is messed up, but it's nothing, a tiny speck of dust compared to the Universe, so insignificant that it may as well be named after a chocolate bar for all the difference it makes. Ha Ha. It can and it will get worse if nothing is done now."

The Inquisitor thought about stopping the video and doing something more important, like going for a leak, but the next thing the figure said, and the way it was said, stopped him in his tracks and he forgot all about his bladder.
"I know, Inquisitor Vrek, what is wrong with everything and how to prevent the problems the galaxy is having with these warp incursions and the endless fighting. I can stop the problems you have with your enemies and return the Galaxy and the Universe to a favourable equilibrium."
Inquisitor Vrek had to rewind the video to make sure he didn't just imagine or mishear that this strange man had used his name, there was no way that this nobody could have known that this video would find it's way to him and at a time that he also seemed to know...

The video continued "You are likely thinking, what does this man know that we don't, and you are right to be sceptical. But I know, for want of a better word, everything."
He reached out and prodded the plant on his desk. "Take this petunia for instance. Sat in it's bowl, not a care in the galaxy you might think. BUT..." said the man, raising his voice "...You'd be wrong. I know what it knows. I have... methods... that allow me to read, record and implant the knowledge and memories of ANY living creature, and I have."
The bowl of petunias thought to itself "Oh no, not again"
The man on the video leant forward and whispered to the plant "Yes, this again"
Sitting up and looking back at the camera he continued calmly, while caressing a leaf, "You see Vrek, I know what this plant knows, and from that I know what it is thinking. But I won't bother you with the philosophy of a petunia, it's not something you would understand" with that, the man pushes the bowl off the desk and a smash is clearly heard on the video. Inquisitor Vrek felt himself relax a little.

"You want to know how to stop those nasty, filthy xenos and daemons and their accomplices from making a mess of your imperium. I can help, you see. I have extensive knowledge from every corner of the galaxy, every race, every species and I even have a contact on the other side. You would like him, he's bright and shiny and a smashing chap, very talkative. I know their plans, their motives, their drives... and their weaknesses. This information would be incredibly useful in anyone's hands as I'm sure you'd agree." Vrek felt himself nod gently in agreement.

The man shifted himself in his chair. Inquisitor Vrek, now didn't move a muscle even as a small fly landed on his cheek and a bead of sweat ran down the side of his nose. He felt comfortably numb.
"So we come to the nitty-gritty, the point, the deal..." the man lifts a small orb from within his desk "This, is what you want. It will allow you access to the information that I have collected. However, I couldn't just stick this in a box and risk some courier being waylaid and shot in the head over. No, I could only hand this over in person, to someone of your stature. I have included with this transmission, the data to find a small star-system where I'll be awaiting your arrival. To access this data you will need the passwords, they are your mother's maiden name and your first servitor's name, that should be plenty secure enough...Ha ha."

The figure started to rise and then sat down again heavily "Oh, and one final thing, I'm sure I don't need to tell you, but bring all the assistance and security that you feel necessary for the gravity of this information. I'll be waiting."
There was a pause and the figure appeared to be contemplating something. Then with a click of his fingers he reached below the desk and retrieved a large revolver which he aimed at the camera and fired. The video stopped with blackness.

Inquisitor Vrek sat in silence for a while and then seemed to come out of a dream with a start. He reached for the comm' device on his desk and set about arranging for troops and transport to the star-system in question...