Counter-curse for Petrification

This counter-curse was used to prevent Petrification by a Basilisk.

In 1992–1993 school year when Mrs. Norris was Petrified by Salazar Slytherin's Basilisk controlled by Tom Riddle Gilderoy Lockhart said that he could have saved her with this spell.

Behind the scenes
However, as it was Lockhart who said it, it is possibly such a spell doesn't exist.

Appearances

 * Harry Potter and the Chamber of Secrets (film)