Varme Tyv

A Varme Tyv (VAHR-muh TEEV; Nor. Varme "heat" + Tyv "thief") is a snake-like Wesen that was seen in.

Characteristics
Varme Tyv are cold-blooded and therefore, not able to generate their own body heat. They can only process human body heat, so they either require the heat of others or need to join a Hibernaculum to survive the winter season. Other sources of heat have no effect on them.

Behavior
Varme Tyv are normally harmless creatures, but if they are not able to join a Hibernaculum, they will steal the heat of others, killing them in doing so. Like many Wesen, they fear Grimms. They very much resent being woken up during their hibernation period and will attack anybody who awake them altogether.

Trivia

 * A Varme Tyv is the first Wesen seen with Norwegian origin.