ENCYCLOPEDIA of HP-VERSE(NOTE on PG-36 PLZ CHECK) - Page 14

Expecto Patronum (ex-PEK-toh pa-TROH-num)
"Patronus Charm"

"expecto" L. expect or look for + "patronus" Medieval L. patron saint, symbolizing a patron or assistant

ALTERNATE ETYMOLOGY: "expecto" L. to expel from the chest, i.e.to send forth from one's self.

Conjures a Patronus, a silvery phantom shape, usually that of an animal, which is the embodiment of the positive thoughts of the caster. A Patronus will drive away Dementors.

• Lupin taught Harry to cast this spell, which he performed with minor success until he faced a large group of Dementors who were trying to attack Sirius Black. Harry saw a Patronus come charging across the lake and later realized that he himself cast it (PA12, GF31).

• Harry used his Patronus Charm to drive off two Dementors in an alley near Privet Drive. He got into trouble for doing it, although he had no honourable alternative under the circumstances (OP1).

• Cast by Harry, then by Hermione at the Ministry of Magic, on which occasion Harry said that it is the only spell that Hermione has trouble with (DH13).

• See MESSENGER SPELL, PATRONUS.

Expelliarmus (ex-pel-ee-AR-mus)
"Disarming Spell"

"expelo" L. to drive out + "arma" L. weapon

Causes opponent's weapon to fly out of his or her hand. The opponent is then said to have been Disarmed.

• Basic defensive spell, taught at the Duelling Club by Snape (CS10) used frequently thereafter. If the exact nature of the opponent's weapon is uncertain, the spell can have unexpected results. If several people cast the spell simultaneously, the target may be rendered unconscious (PA19, GF31, GF34)

• Lupin used this on Harry, Ron, and Hermione simultaneously in the Shrieking Shack on the night they first met Sirius Black (PA17).

• Snape's use of this spell against Lockhart had rather violent results (CS10).

• This was the first spell taught at the first D.A. meeting. Zacharias Smith thought this was silly, but Harry pointed out that he used that spell againstVoldemort just a few months before and that it had saved his life (OP18).

• Harry cast this at Stan Shunpike (DH4).

• Used by Ron against Bellatrix Lestrange at Malfoy Manor (DH23).

• Harry again used this against Voldemort during their final duel (DH36).

• Referred to in verb form Disarm (DH4, DH5, etc.)

Extension Charm, Undetectable

no incantation given

Extends the internal dimensions of the target object without affecting the external dimensions.

• Hermione cast this on the beaded handbag that she took to the wedding; throughout the rest of the story, it is used to carry books, a tent when not in use,clothes, and all the other supplies of the journey (DH9). While the bag makes an unusual noise if dropped (DH8), it does not appear to weigh more than a normal bag of its size and can even be stuffed down a sock in an emergency (DH26).

• See WIZARD SPACE.