User blog comment:BannedLagiacrus/Monster Appreciation Week: Drilltusk Tetsucabra/@comment-28550225-20161203203039/@comment-26034899-20161204020134

I do believe that it was explained that Deviants are monsters who survived previous encounters with hunters and developed new traits and abilities as a result; in a sense, they evolved to gain advantages over hunters. But if you have a different explanation, go ahead and say it. It would be interesting to hear.