Black Quill

"That's right. Because you know, deep down... You deserved to be punished. Don't you, Mr. Potter? Go on."

- Dolores Umbridge to Harry Potter in detention

A Blood Quill is the Quill that Dolores Umbridge used to torture Hogwarts students as a punishment for making her angry, [Harry saying that Voldemort is back, which Umbridge refuses] or breaking any of the school rules. It does not require any ink, as it writes with the blood of the unfortunate writer. It scars the back of the right hand of the writer. If already writen of the right hand, it would proceed on the left hand,{which is Harry's case}[Minerva McGonagall]] considers it a "medieval method" of teaching.

Harry Potter had to use it, and on the back of his right hand is a scar saying "I must not tell lies". Lee Jordan also had to use it.

"You've been through all that persecution from the Ministry when they were trying to make out you were unstable and a liar. You can still see the marks on the back of your hand where that evil woman made you write with your own blood, but you stuck to your story anyway..."

- Hermione to Harry Potter one year after the punishment

Behind the scenes

 * In Harry Potter and the Order of the Phoenix (film), all the Dumbledore's Army members had to use it. It created so much pain that it made several people, including Nigel, Luna and Ginny, start sobbing over the deep gouges in the backs of their hands. Harry's scars read "I will not break rules", (in his right hand) and "I must not tell lies" (in his left hand).

Appearances

 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Order of the Phoenix (film)
 * Harry Potter and the Half-Blood Prince