Muggles' Guide to Harry Potter/Magic/Peruvian Instant Darkness Powder
|Muggles' Guide to Harry Potter - Magic|
|Peruvian Instant Darkness Powder|
|Features||Creates instant darkness|
|First Appearance||Harry Potter and the Half-Blood Prince|
Peruvian Instant Darkness Powder is, as the name suggests, a powder which renders an area instantly dark when it is thrown.
A product of Weasleys' Wizard Wheezes, Peruvian Instant Darkness Powder is one of the more serious products that the Twins sell to the Ministry of Magic and similar organizations. We see it in the back room of the Twins' shop when Fred and George are showing Harry around.
Somehow, Draco Malfoy manages to purchase some of this material, and uses it to mask the invasion of Hogwarts from the Room of Requirement in Harry Potter and the Half-Blood Prince. When the powder is thrown at Ron, Ginny, and Neville, they are unable to see anything, which means that it must have blocked all light from entering the region where the powder was thrown; however, Draco, who has a Hand of Glory, is still able to see to lead the invading Death Eaters past them.