Firestorm

Firestorm is a charm that conjures a ring of fire.

Effects
The ring of fire produced by this spell can come directly from the caster's wand or can spring like a lasso from another source (e.g. a torch bracket). The caster is able to control the movement and direction of the flames with enough precision to strike specific targets, and control what the ring encircles. The spell Partis Temporus can create a gap in the flames to allow safe passage through.

History of use
Albus Dumbledore first used this spell in 1996 an attempt to entrap Voldemort during the Duel in the Ministry Atrium. He used it again 1997, when he and Harry Potter entered a seaside cave in an attempt to locate one of Lord Voldemort's Horcruxes; when the Inferi guarding the Horcrux attacked, Dumbledore conjured a firestorm to drive them back (as Inferi fear light and heat), saving both their lives in the process.

The last known use of this spell was by Minerva McGonagall during the Ousting of Severus Snape - she caused a torch bracket to fly of the wall and produce the fiery lasso to bind Snape.

Known Practitioners

 * Albus Dumbledore
 * Professor McGonagall



Behind the scenes

 * In the soundtrack from the film version of Harry Potter and the Half-Blood Prince, the score for this scene was titled Inferi in the Firestorm, hence the article name.
 * This spell may be a variant of Incendio, Stream of Flames and Fiendfyre.
 * Both recorded uses of this charm against a Dark Wizard resulted in said wizard nullifying it with Fire to snake.
 * All recorded uses of this charm were by professors of transfiguration who later became Hogwarts heads.

Appearances

 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Half-Blood Prince (film)
 * Harry Potter and the Half-Blood Prince (video game)