Gubraithian Fire (incantation unknown), also known as Everlasting fire, was a flame which had been enchanted to burn forever without dying; presumably even after the caster responsible for it perishes. It was quite an advanced piece of magic, as few wizards were capable of it.
Whether or not the casting of this spell was taught at Hogwarts was unknown, however, according to Hermione Granger, by Harry Potter's fifth year, Professor Flitwick had mentioned the spell at least twice during his Charms lessons.
- Harry Potter and the Order of the Phoenix (First mentioned)
- Harry Potter and the Half-Blood Prince (Possible appearance)
- Harry Potter and the Half-Blood Prince (film) (Possible appearance)