A man-sized rooster-like bird with iridescent feathers, fiery tail, bill, and legs, that creates lightning and thunder with its wing flaps. It is a blood-drinking beast that can create illusions to attract women to seduce and drain of blood. It manifests through lightning and buries its eggs where lightning strikes. It must eat a lot to create fat, which is the fuel for its lightning. Its fat is also a potent medicine.

Though rare, on Taggarus, impundulus are a favorite for familiars.