Obliviates are a type of tech-heresy within the Adeptus Mechanicus, one that is considered an abomination to the Inquisition. It has been known to cause terror in the hearts of Imperial citizens in the Calixis Sector.
Constructed by the notorious Heretek Illucis Grizvaldi and his followers through the use of devices known as oblivion volitors, these machines are a corrupted as well as clumsy pattern of neuro-augmetic which is surgically implanted within the brain of the subject and turns them into beings known as Obliviates. These soulless beings are little more than empty shells that live on whilst the soul has been long destroyed by the procedure. Once created, hereteks further augment the Obliviates with crude metallic fangs and blades whereupon they are unleashed like feral pack animals. Thus, they debase the divine form of man by treating them as vile animals in an effort to strike a weapon of terror against Imperial citizens. The Obliviates represent the oblivion of cherished souls that the God-Emperor protects.
To Psykers, these constructs' signatures are no different from those of aggressive combat servitors, and the Mechanicus Calixis have often told the Inquisition that the Obliviates are little different from certain patterns of servitors. Despite their words, the Ordos and the Adeptus Ministorum have decreed that oblivion volitors destroy the soul and as such, the Mechanicus are honour-bound to aid them in destroying what they consider to be a minor tech-heresy. The unfortunates who are victims of the process are often believed to be completely devoid of a soul (though they are not complete "nulls" after the fashion of Blanks or "Untouchables"). Instead, their soullessness has been brought about through their minds being broken by twisted heretical technology.