- "Pushing Harry roughly aside, he knelt over Malfoy, drew his wand and traced it over the deep wounds Harry's curse had made, muttering an incantation that sounded almost like song. The flow of blood seemed to ease; Snape wiped the residue from Malfoy's face and repeated his spell. Now the wounds seemed to be knitting."
Vulnera Sanentur was the song-like incantation of the counter-curse to the Sectumsempra spell, both of which were invented by Professor Severus Snape under his alias of "the Half-Blood Prince". It had to be repeated thrice for best effect; the first time slowed the flow of blood to prevent death by exsanguination; the second time cleared residue and began to heal the wounds; and the third time fully knit the wounds, although dittany had to be applied to prevent permanent scarring.
Behind the scenes
- Molly Weasley did not use this spell on George Weasley when Snape mutilated his ear in Harry Potter and the Deathly Hallows, most likely because it was a specific counter-curse that remained generally within only his knowledge.
- In the novel, Harry stood and watched Snape use the spell on Malfoy, because he himself was too shocked to be able to move. However, in the film, Harry ran straight away to the Gryffindor common room.
- Harry Potter and the Half-Blood Prince (First appearance)
- Harry Potter and the Half-Blood Prince (film) (First identified as Vulnera Sanentur)