Finite Inflamare
The spell Hermione uses in the 1st movie of Harry Potter (Harry Potter and the Sorcerers stone) to ignite Professor Snapes robes on fire during a quidditch match. It was a successful spell produced by our own Gryffindor genius.
Hermione: "let me handle this" (walks down to the bleachers, whispering) "Finite Inflamare