Beastman
From Lexicanum
Beastmen (Homo sapiens variatus) are the most bestial and inhuman type of abhuman. Their bodies combine the features of both human and animal. Beastmen are much more variable in form than other abhuman types. They are considered abhumans rather than ordinary mutants, as individual Beastmen conform to a general physical and genetic standard and are no more prone to further mutation than normal humans.
Beastmen were initially part of first edition Imperial Guard armies. They can still be found in Imperial Guard armies with the use of the Homo Sapiens Variatus Doctrine, and in the army list for the Lost and the Damned (as an upgrade to ordinary mutants in the codex).
Those Beastmen who have been introduced into the Imperial cult possess a simple but fierce devotion to the Emperor, regarding him as a vengeful god which demands tribute in the form of the blood of his enemies. They are driven by the need to atone for the sin of being mutants by fighting for the Emperor.
