The Lych King is an ancient beast, so old it can no longer grow true fur; only the in the light of the moon does vellus hair reveal what great lengths its fur used to grow to.
The Lycanthrope feeds off the soul of its prey, extending its lifespan, and leaves the body to feed those who still consume within the mortal plane.
The Lych king croons toward its prey. The soul quivers within, wanting to pull away from its container and unite with whatever is calling to it. This can affect multiple entities that can hear this noise in the vicinity. The soul exits the body itself, leaving the prey in a zombified state, no longer eating, interacting with the environment, or exhibiting fight-or-flight response. They simply exist until they are killed by predator.