Changes: Protective enchantment

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""If we're staying, we should put some protective enchantments around the place," she replied, and raising her wand, she began to walk in a wide circle around Harry and Ron, murmuring incantations as she went."

— Hermione Granger casting protective enchantments in 1997^[src]

Protective enchantments are spells used to protect an area that the caster wants protected. The spells that are cast usually last a long time and shield specific places that the caster intended to shield. There are many different types of protective enchantments.

History

There are many different types of protective enchantment with many different effects. It is unknown how old some of the spells are and who exactly invented them. The enchantments were used regularly during the Second Wizarding War in order for the wizarding community to protect themselves from Death Eaters and by Death Eaters themselves, it can be assumed that they were used during the First Wizarding War as well.

Casting

In order to protect a certain place, the caster has to repeat incantations of charms over and over in the area they wish to protect. The spells circle the area and create a light effect similar to a heat wave around the protected area.

Known spells

Known uses

SalvioHexia — Hermione using Salvio Hexia

Enchantments are put over many places such as Gringotts, Hogwarts, The Burrow etc.
The Dome Effect that happens when people cast Priori Incantatem, as Voldemort and Harry Potter did in 1994.
The Fidelius Charm that is cast over houses owned by members of the Order of the Phoenix.
The lot of enchantments cast over The Burrow, including the Fidelius Charm, in order to hold William Weasley and Fleur Delacour's wedding.
Hermione Granger cast Protego Totalum, Salvio Hexia, Repello Muggletum, the Muffliato Charm, Cave Inimicum, and the Disillusionment Charm in 1997 over her tent site (along with Ronald Weasley and Harry Potter).
Harry Potter would occasionally cast the protective enchantments that Hermione would use during the Horcrux Hunt.
At the start of the Battle of Hogwarts, Filius Flitwick, Molly Weasley, and Horace Slughorn cast Protego Maxima, Fianto Duri, and Repello Inimicum; only to be broken by the Shield penetration spell performed by Tom Riddle shortly after.
At the start of the Battle of Hogwarts, Filius Flitwick cast Protego Horribilis.

Behind the scenes

PowerfulSpellVoldemort — Voldemort casting a powerful spell that broke Hogwarts' protections

The Vanishing Cabinets are able to bypass most protective enchantments, as a pair was used to penetrate Hogwarts Castle, which was heavily armed with magical protections, ancient and recently added.
In the video game adaption of Harry Potter and the Goblet of Fire the Dome Effect that happened during Priori Incantatem is not seen. Instead Voldemort uses the spell to distract Harry while his living skeletons and his paternal family's grave attacks him.
In the Nintendo DS version of the video game adaptation of Harry Potter and the Deathly Hallows: Part 2, the Protective Enchantments had to be cast from certain defensive shield locations.

@@ Line 21: / Line 21: @@
 ==Known spells==
 *[[Age Line]]
+*[[Caterwauling Charm]]
-*''[[Cave inimicum]]''
+*''[[Cave inimicum|Cave Inimicum]]''
 *[[Disillusionment Charm]]
 *''[[Fianto Duri]]''