Someone needs to explain their wacky biology to me, please. My four questions are these.
(The following are spoilers for the 'Hibernaculum' episode of Grimm Season Four)
I understand that cold-blooded creatures lose heat, but in the episode with Varme Tyv in it, it wasn't even cold outside, as said by other characters. So how did the Gundersons die and get covered in ice within such a short time?
What exactly allows one to suck the heat from your body with a bite?
The phrase Varme Tyv means 'Heat Theif' in Swedish and Norwegian. Under the assumption that the Wesen in Grimm are all based on fairy tales, what nordic tale inspired these reptilian creatures?
Monroe says that a Varme Tyv could 'freeze to death while sitting next to a campfire' because they only process human body heat. But they were fine driving in a car. And produced steaming heat when lying together in the hibernaculum. So if the only thing in this world that can warm them is taking heat from humans, then how is the Varme Tyv not extinct?