What spell in any Harry Potter movie is well known and the color blue?

The spell has to be able to hurt the opponent. And by the way, which spell in Harry Potter and the Goblet of Fire game for the PSP is actually a real spell? In the game, can Wingardium Levisosa actually damage the creatures by hitting them against the wall? I only know that the thing you can kill them is by throwing them off cliffs.

Aqumenti, It's blue and you use it to put flames out and stuff. And yeah, I usually use wingardium to kill those weird little creature, just be careful when you knock them into each other, I accidentally knocked one out of midair and onto hermione.

I know in Harry Potter and the Chamber of Secrets for gamecube you can use "flippendo" which is a blue spell that is used to attack and knock the opponent backwards. and i don't know about the GoF PSP unfortunately but i know that wingardium leviosa is used to levitate items so i suppose it it's possible for you to, in the game, move the person while you are levitating them and if you can throw them at the same time, i'm sure it would damage them if you threw them into the wall. hope i helped (:

incendio produces blue fire.

flapendo?