The Spear Smashaz Klan.

Of all the alien horrors I have encountered in my time serving The God-Emperor, this aberrant strain of orkoid is one which troubles me most. For somehow the universe has seen fit to twist the greenskin race into a mockery of the human form and in doing so armed it with the most terrifying of abilities to spread their taint across our galaxy. As I dissect the specimens brought back to me by my acolytes in the field I am horrified by what I find. As much as the guardsmen might joke about taking the right of conquest with the orc-women. Examining the inner workings of a green skin with these organ systems is nothing short of horrifying when one considers the implications.
The Spear Smashaz are bifurcated into specialized male and female castes which can spawn as readily from ground spores as any other orkoid. Their sexual organs are not necessary for the continuance of their klan-line but are in fact weapons of war.
Multiple liberated prisoners and debriefed guardsmen all report that the phallic appendages sported by the male orks is violently functional. Those unfortunate victims of the male orks attention suffer what the magos-biologis are calling 'urdling syndrome'. A noxious infection which causes the infected human to produce a small rather nasty form of squigoid which crawl free from the host-orifices and saturate the area with green-skin spores.

As devious and disturbing as the male variant is, the female variant appears all the more frightening for its potential. These 'bitchez' as the ork parlance refers to them, seem as capable in directing mutation and guiding evolution as the tyranid swarms. The female orks seem to be more than able to perform all the same acts of carnage and savagery as their male counterparts while also being capable of producing customized squigs and greenskins which meet her needs and specifications. While it is unknown if pure human essence are required for their blasphemeous acts of geno-alchemy. There does appear to be a pattern of bitchez with the largest harems produce the most robust offspring. Strangely, the bitchez seem indifferent to the sex of their captives. For the details of such copulation, see the attached testimonial files.

Though we are stretched thin with all the resources engaged in Lord Guilliman's crusade, I cannot emphasize enough that beyond the superficial and physiological differences, this new Klan of orks represents a threat which is different in scope and kind to any greenskin threat The Emperor's warriors have encountered before. I cannot explain it, but these orks seem more focused, determined. There is an eagerness to conquer, subjugate, and procreate that seems to temper the ork's innate fighting spirit into something more concentrated and all the more able to focus the empyrean energies which the orks refer to with as much volume as they can at every opportunity.
I shall mobilize what resources I can and contain try to contain this threat, though without astartes support I fear that it will be too little, too late.
May the God-Emperor keep my soul. For I fear that before this war is over, they aliens will have taken my body.
Tarlana Benks, Ordo Xenos.