Harry casts his Patronus while in disguise at the Minstry.

A difficult spell, and the only known defence against Dementors


Expecto Patronum fact file


Type

Defensive charm

Incantation

Expecto Patronum

Purpose

To protect against Dementors by summoning one's happiest memories

The effect it has on the recipient

Shields against and can overpower the foul effects of Dementors

Famous moment a wizard or witch uses it

Harry Potter uses a Patronus to save a future version of himself from Dementors, while using the Time-Turner; Severus Snape uses his corporeal Patronus – a doe – to protect the Golden Trio from afar while they are searching for the Deathly Hallows

Written by J.K Rowling
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