Certainly not Sergeant Harry Callahan, at least not the last time I looked. This creature looks a lot more magical in origin than from a science fiction setting, but here goes! This creature began as a normal, ordinary creature, that was mundane to the player's setting. It may even have began as a member of the same sentient species as the player character(s). It has, however, suffered from a tragic accident. It has either been the victim of a malfunction of a matter teleportation or a dimensional transportation device. The device was supposed to break down the character's molecular structure into energy, beam the energy to another location (or dimension) and reassemble that energy back into its original material structure. That is what it was supposed to do. This time it did not. When the energy coalesced and the bright light faded, there stood this behemoth instead of the player character. Obviously enough of the brain is intact to give this misshapen horror life, a hearty appetite, and rudimentary hunting skills, but that is about it. It can no longer distinguish friends from foes, unless a former love interest is somewhere nearby. Then it is 50% likely to become zealously overprotective of that person, and just as likely to desire to eat that person more than anyone else in the world.