Yes, it was invented by Severus Snape.
snape. his mothers maiden name was prince and he is halfblood. hence the halfblood prince.
yes
Sectumsempra!
You pronounce the spell like this, (sec-tum-sem-prah). and you spell it like this Sectumsempra.
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".
if You mean the spells in the potions book we learned mufliato, levicorpus (liberacorpus) and sectumsempra
he iin the entrance courtyard, ouside the entrance hall
I'll name one; people can discuss if they want: Sectumsempra; invented by, non-the-less, Severus Snape.
After the Sectumsempra incident in HP6.
It's called "ADVANCED POTION-MAKING By Tiberius Borage". However the Book shown in the Movie and the Book shown on the front of the "Harry Potter And The Half Blood Prince" book, look slightly different.
Sectumsempra is a spell from Harry Potter. Good job, smart one.
they made 7 harry potter books: The Sorcerers stone, chamber of secrets, prisoner of azskaban, goblet of fire, order of the pheonix, halfblood prince, and the deathly hallows. they made 8 harry potter movies:The Sorcerers stone, chamber of secrets, prisoner of azskaban, goblet of fire, order of the pheonix, halfblood prince, deathly hallows part one, and deathly hallows part two.