Shapeshifter

A shapeshifter is essentially a human that, over time, learned to change their form to anything that they want to. When they change forms, they literally shed the other person that they were wearing. Their teeth, skin, etc are all gone as they shift into someone new. What makes the shifter so unique is that it also captures the memories of the person that they are wearing, that means if they are wanting to trap someone, they can easily do so by mimicking and/or pretending to be someone that is trusted to someone else. The only known way to kill them is a silver blad or bullet to the heart.