User blog comment:Paul.rea/Teen Wolf News 020117/@comment-27881788-20170206165208/@comment-4091815-20170206200229

Valack is an enhanced human. In many ways, he was like the Dread Doctors in that he found ways to enhance himself through supernatural means. He experimented on supernatural creatures held at Eichen House for many years before they caught him and locked him up. All of his changes of appearance were just tricks he'd learned over the years of studying both the human mind and the supernatural.