Heliopath

From Hpwiki

A Heliopath is a spirit of fire, a great tall flaming creature that gallops across the ground burning everything in front of it. Luna Lovegood says that the Ministry for Magic owns several Heliopaths.
Note: this description - as well as the existence of heliopaths - is according to Luna Lovegood, while most other people think heliopaths are a product of fantasy. However, we should keep in mind that Muggles are wrong in believing that wizards are a product of fantasy.