ENCYCLOPEDIA of HP-VERSE(NOTE on PG-36 PLZ CHECK) (Page 5)

arrows, wand

incantation unknown

Shoots arrows out of a wand.

• The supporters of the Appleby Arrows were fond of firing arrows out of their wands to celebrate goals. The practice was outlawed in 1894 (QA7).

• See also WAND EFFECTS

Atmospheric Charm

no names or words given

Something to do with weather effects such as are seen at Ministry of Magic headquarters in London.

• Hermione says that if something has gone wrong with one, it will be more difficult to fix than simply by casting Finite Incantatem (DH12).

Avada Kedavra (uh-VAH-duh kuh-DAH-vruh)

"Killing Curse"

Aramaic: "adhadda kedhabhra" - "let the thing be destroyed". 
NOTE: Abracadabra is a cabbalistic charm in Judaic mythology that is supposed to bring healing powers. One of its sources is believed to be from Aramaic avada kedavra, another is the Phoenician alphabet (a-bra-ca-dabra).

Causes instant death in a flash of green light, usually leaving no sign of physical damage or of the cause of death that would be detectable to a Muggle autopsy.

• One of the Unforgivable Curses (GF14), said to be unblockable and with no counter-curse, although Albus Dumbledore managed to protect Harryby putting some statues in its way during his duel with Voldemort in the Atrium (OP36).

• This spell produces a jet (OP36) or flash (GF14) of green light, and a sound as though some huge invisible thing is rushing at the target (GF1,GF14)

• Harry is the only known person to survive the Killing Curse (esp. PS1, GF14, also GF34).

• This was the curse used by Tom Marvolo Riddle to kill his father and paternal grandparents, who were found unmarked except for an expression of absolute terror on their faces. A Muggle autopsy could not determine a cause of death (GF1). As far as Albus Dumbledore was aware duringHarry's sixth year, the Muggle authorities never learned how the Riddles died because the Killing Curse usually leaves no sign of damage, Harry's scar being the only known exception. The Ministry of Magic, however, knew at once that the Riddles had been murdered by a wizard. Riddle had taken care to use someone else's wand - that of his maternal uncle, Morfin Gaunt - to commit the murder, so that the magical equivalent of forensics would point to a suspect other than himself, and had further covered himself by tampering with Morfin's memory so that Morfin himself believed he had committed the crimes (HBP17). It's a disgrace to the name of wizarding law enforcement that no effort appears to have been made to clear Frank Bryce of the crime, the only suspect the Muggle authorities were aware of, when Morfin was sent to Azkaban for the crime (HBP17).

• Voldemort has also personally used the Killing Curse to murder Harry's parents (GF34, DH17), Bertha Jorkins (GF33), Frank Bryce (GF1), andCharity Burbage (DH1).

• Wormtail, on orders from Voldemort, used Voldemort's wand to murder Cedric Diggory with the Killing Curse (GF32).

• A Death Eater tried to cast this on Hermione in the Battle of the Department of Mysteries, but was tackled by Harry halfway through the incantation (OP35).

• Voldemort tried to cast the Killing Curse on Harry (doesn't he ever learn?) and on Albus Dumbledore after the Battle of the Department of Mysteries. Fawkes swallowed a bolt of it at one point (OP36).

• Judging from the effect, Bellatrix Lestrange killed a fox with a nonverbal Killing Curse just before she and her sister Narcissa paid a call on Snapeto discuss Draco (HBP2).

• Mentioned as the Killing Curse in a Daily Prophet article (HBP3).

• "That phrase...was used by ancient wizards to make illnesses disappear. However, there's no proof it was ever used to kill anyone." (pp.17-19)

Avis (AH-vis)

"avis" L. bird

Conjures a flock of small, twittering birds.

• Mr. Ollivander used this spell to test Viktor Krum's wand during the Weighing of the Wands, sending the birds out the window (GF18).

• See CONJURING SPELLS.

Babbling Curse

incantation unknown

Exact effect not mentioned, but one can assume it causes the victim to babble.

• Lockhart supposedly cured a simple Transylvanian villager of this affliction (CS10).

Backfiring Jinx

incantation unknown

Exact effect not mentioned, but can be nasty.

• The Office for the Detection and Confiscation of Counterfeit Defensive Spells and Protective Objects got wind of one of these in Elephant and Castlein July 1996 [Y16], but it was sorted out by the Magical Law Enforcement Squad before they arrived on the scene (HBP5).