After the Sectumsempra incident in HP6.
Sectumsempra is a Dark Arts curse invented by Severus Snape (under his alias of "The Half-Blood Prince") for the use against his enemies, and it soon became one of his specialities. When uttered, its effect is the equivalent of an invisible sword, slashing the target repeatedly. The injuries appear to follow the movements of the caster's wand, and thus inflicts the most damage if cast with rapid waving movements. It works best on living targets and has no noticeable effect on inanimate objects or dead ones, such as Inferi, other than slashing them pointlessly. Sometimes the slashing cuts are continual, or it could be one cut.
In the book, Snape uses a non-verbal spell, so we don't know which spell he used, In the movie, the spell Snape uses is "Vipera Evanasca".
In the half-blood prince page 533 and in the deathly hallows page 116
no
Chapter 24 sectumsempra pages 521- 522
You pronounce the spell like this, (sec-tum-sem-prah). and you spell it like this Sectumsempra.
Sectumsempra!
After the Sectumsempra incident in HP6.
Yes, it was invented by Severus Snape.
Sectumsempra is a spell from Harry Potter. Good job, smart one.
The spell that Harry Potter used to cause Draco Malfoy to bleed continuously in the bathroom duel scene of "Harry Potter and the Half-Blood Prince" is called "sectumsempra".
the curse is sectumsempra which makes gashes in the chest and blood spurt out. (but in saying that, harry did not know what the spell did...)
It is 'real' in the world of Harry Potter, yes. Snape invented it and wrote it in his old potions textbook, where Harry learned it, and used it on Draco.
Draco Malfoy was coverd in blood because amazing Harry potter did the spell "sectumsempra"
if You mean the spells in the potions book we learned mufliato, levicorpus (liberacorpus) and sectumsempra
Cursus are found for an instance in Harry Potter Severus Snape inventesd the Sectumsempra curse