Hyenadon

A hyaenodon is a prehistoric wolf -like creature, predator and scavenger, A hyaenodon is a wolf - like creature, predator and scavenger, resembling modern hyenas standing 4’ tall at the shoulder, with enormously powerful jaws and neck muscles. If a hyaenodon succeeds in a bite attack, it does not let go, but instead pulls its victim off to kill and devour at its leisure. It requires a DC 14 Strength check to prevent the animal from pulling its victim away, and a DC 20 Strength check to actually get free from the locked jaws.