hamster
An extra planar being failing to mimic the far superior Guinea Pigs.  Their mind powers fall short of the greater cavy, and they often go into a rage when they fail at their prime task of mind controlling humans.  Beware their bite, as they sometimes will not release until death.  Hamsters will only die if there is a possibility it would inconvenience a human.
If you fear for your life from a Hamster, seek out the shelter of the superior and more benevolent Guinea Pig.