Werewolf

The Werewolf (Also known as the Lupine Wavelength Haemovariform) is a monster that appears as the secondary antagonist of the Season 19 finale.

He has a humanoid body that resembles a bipedal wolf, but he can run on all fours. He also has monochromatic vision and are highly resistant to bullets but he can be made to think that they are allergic to mistletoe. The only known way to kill him is an overexposure to moonlight on which he thrives, though it is believed that silver bullets work just as well. He has razor sharp claws and teeth which he can use to rip people to shreds.

The Werewolf was originally a young human who got infected from being bitten by another Lupine Wavelength Haemovariform. The Host then developed black eyes and transformed into the Werewolf during the Full Moon.

Davros uses the Werewolf to help establish his rule over the people of the Middle Ages. The Doctors managed to kill the Werewolf by drowning him in the moonlight that was required to keep him alive.