Sectumsempra is a Dark curse invented by Severus Snape (under his alias of "The Half-Blood Prince") for 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. 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.

The curse also has a counter-curse, bleepumed to be Vulnera Sanentur[1], also invented by Snape. The first time it is used, the flow of blood eases up; the second time causes the wounds to knit; the third time removes the worst effects of the curse near-instantly. The victim would still require medical treatment, and if Dittany is applied immediately, scarring can be avoided.

Though the counter-curse can heal the wounds, and Dittany can prevent scars, any body parts that have been severed by this curse cannot be grown back, as seen when George Weasley lost his ear to it. KNOWN USES * While attending Hogwarts School of Witchcraft and Wizardry and being harbleeped by James Potter, Snape used the spell while fighting him. James Potter, however, did not receive the full brunt of the attack due to Snape's lack of aim and nonverbal use; resulting in one deep gash upon his cheek as opposed to potentially fatal wounds to his body.
* In a duel with Draco Malfoy, Harry used the curse upon him when Malfoy was poised to use a Cruciatus Curse. The result was Malfoy almost dying, proving how deadly the curse can be.
* While in the Horcrux cave, Harry used the spell on an army of Inferi left to protect the Horcrux. This was to no avail, as Inferi could neither feel the gashes inflicted upon them nor lose any blood from the cuts.
* During the Battle of the Astronomy Tower, Harry attempted to use the spell against Snape as he fled the school with the Death Eaters. Snape, however, deflected the spell easily, and revealed that he was the spell's creator, the "Half-Blood Prince."
* During the Battle over Little Whinging, Snape, attempting to stop a Death Eater from cursing Remus Lupin, aimed a Sectumsempra curse at him, but it accidentally struck George Weasley. George lost an ear due to his injury, which could not be healed because it was caused by a curse. Sectumsempra derives from the Latin sectum, "having been cut" (comparable to the English word "section" or "segmented"), and possibly semper, "always." It can be translated as "always cutting" or "sever forever", the latter being a pun on Snape's first name, Severus.

An Inferius (plural: Inferi) is the dead body of a human reanimated by a Dark Wizard, similar to a zombie. They have no free will, and cannot think for themselves; their purpose is merely to serve as puppets of the Dark Wizard who reanimated them. They were used by Voldemort in both the First Wizarding War and the Second Wizarding War. It is mentioned that the Dark Wizard Gellert Grindelwald also sought to create an army of Inferi. It is unknown as to whether he succeeded. Inferi are created through the magical branch of Dark Arts called Necromancy.[1]Because Inferi are creatures of the dark, they dislike light and heat. The most effective spell against them is therefore a fire-summoning spell, such as Incendio, Lacarnum Inflammare, or Fiendfyre. Other spells might work against a few Inferi, but might not be useful against a whole army of them. It must be noted that Inferi are resistant to most spells: they cannot feel pain, and thus are unaffected by many attacks whose main effect is pain. This is evident when Harry Potter attempts to use the dark spell Sectumsempra on the Inferi in the Horcrux cave.[2]

* In 1979, Regulus Black betrayed Voldemort and attempted to steal Salazar Slytherin's Locket. He was killed by an army of Inferi in his attempt and his house-elf Kreacher took the locket and hid it in the Blacks' mansion.
* In 1997, Harry Potter and Albus Dumbledore encountered an army of Inferi in their attempt to steal one of Voldemort's Horcruxes. Dumbledore successfully repelled them by conjuring a ring of fire big enough to surround both Harry and himself.
* Not exactly counted as a real encounter, but worth mentioning: Mundungus Fletcher was arrested and put into Azkaban because he disguised himself as an Inferius after being caught during a burglary.[2]
* The Ministry warned the community that Voldemort may be using Inferi once again in the Second Wizarding War, and he was mentioned that he did use as much as an army during the First War.

All of this is true which I have learned before

ok

Did you even read it?

no its to long

well read it it is good to know this. And dont be so lazy

i read it its cool

it is from a wiki

it is

what from a wiki its should be from you cuz this is way to boring i hate wiki

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