A hellhound is a dog of Hell, found in mythology, folklore and fiction.
Hellhounds typically have features such as an unnaturally large size, a black fur color, glowing red eyes, super strength or speed, ghostly or phantom
characteristics, and sometimes even the ability to talk.
Hellhounds are often
associated with fire, and may have fire-based abilities and appearances.
They are often assigned to guard the entrance to the world of the dead or undertake other duties related to the afterlife or the supernatural, such as hunting down lost souls or guarding a supernatural treasure.
As legend goes, if one happened to see the hellhound
three times, he or she will die an abrupt and unseen death.