- "...You-Know-Who and his followers sent the Dark Mark into the air whenever they killed. The terror it inspired... you have no idea, you’re too young. Just picture coming home and finding the Dark Mark hovering over your house, and knowing what you’re about to find inside... Everyone’s worst fear... the very worst."
- —Arthur Weasley[src]
The Dark Mark is the symbol of Lord Voldemort and his Death Eaters. It refers both to a magically induced brand that every Death Eater bears on his or her inner left forearm, and to the same symbol conjured in the air by the spell Morsmordre.
- "Then he realised that it was a colossal skull, composed of what looked like emerald stars, with a serpent protruding from its mouth like a tongue. As they watched, it rose higher and higher, blazing in a haze of greenish smoke, etched against the black sky like a new constellation."
- —Description of the Dark Mark[src]
The Dark Mark appears as a glittering green skull with a snake protruding from its mouth. This might have been inspired by the hiding place of the Basilisk in the Chamber of Secrets. When summoned, the basilisk would emerge from the mouth of Salazar Slytherin. The serpent is also the symbol of Slytherin house, and thus appropriate to be used by the Heir of Slytherin.
The symbol might also be related to Lord Voldemort being a Parselmouth, a gift he thought made him unlike the rest of the wizarding world. The Dark Mark on the forearm is black, while the Dark Mark conjured by Morsmordre is green, this is most likely for more contrast with each respective background as a black Dark Mark would be hard to see in the night sky. It is also said that the Dark Mark represents immortality and power.
On the arm
An inactive Dark Mark appears as a faint mark on the inner part of the left forearm, similar to that of "a vivid red tattoo"; an active one is jet black.
Lord Voldemort placed the Dark Mark brand on his followers' inner left forearms both as a sign of their loyalty to him and as a method of summoning them to him when he desired. This was done by pressing his finger to any Death Eater's Mark, which turns it jet black and delivers a burning sensation to any person with the Dark Mark. Feeling the burn, the Death Eaters then Apparate to Voldemort's side. It is unknown whether all Death Eaters will always feel the burning, or if Voldemort can choose to signal a specific person or people. Traitors such as Igor Karkaroff could somehow avoid being summoned by Voldemort.
The deepness of the Mark's colour is connected to Voldemort's physical health. When Voldemort suffered his first defeat, the Marks on the Death Eaters faded, but as he began regaining his strength, the faded marks became clearer, and burnt slightly, a sign of Voldemort's return to his Death Eaters; the burn may be sudden and stings rather sharply, as Snape suddenly gripped where his mark was during the night Harry Potter was solving the Golden egg riddle. Death Eaters could also use it to signal Voldemort by pressing on their Dark Marks. Bearing this mark also allows the Death Eaters to bypass a cursed barrier that is also invented by Voldemort. During the height of the Second Wizarding War, they were under orders to only signal Voldemort if they had successfully captured Harry Potter, or face severe penalties. After Voldemort was defeated for the final time, the Dark Marks faded to a scar, similar to Harry's lightning-bolt scar. They would no longer burn, but would remain nevertheless. There is no possible way of getting rid of the Dark Mark.
In the sky
As a signature of their work, the Death Eaters can also use a spell to create an image of the Dark Mark in the sky. The incantation of this spell is Morsmordre. The appearance of the Mark in the sky is basically the same as the Mark on the forearm, but green.
Notable uses include in the woods during the 1994 Quidditch World Cup Final, when it was cast by Barty Crouch Jr, and over the Astronomy Tower of Hogwarts School of Witchcraft and Wizardry by Gibbon in 1997. It normally appears where there has been a murder by the hands of Death Eaters or Lord Voldemort. Due to the terror Voldemort and his Death Eaters had brought to the world in the First Wizarding War, the Dark Mark being cast over a location brings deep fear to the community, even after Voldemort's first downfall.
The other form of the Dark Mark has been seen when Voldemort touches the Dark Mark branded on an arm, a skull forms in the sky above and the alerted Death Eaters Apparate out of its mouth instead of a snake.
Behind the scenes
- Fred and George Weasley created Edible Dark Marks for their joke shop.
- The Dark Mark in the sky and on the Death Eaters' arms are different in appearance. The one in the sky is plainly a skull with a snake coming out straight out of its mouth, while the brand on a Death Eater's arm is much more intricate and detailed, the snake being much longer and winding.
- The spells used to brand and conjure the Dark Mark were likely invented by Lord Voldemort. He may have based the spell on the Protean Charm, as Hermione Granger mentioned in 1995 that the Dark Mark inspired her to use the Protean Charm to create the method of communication used by Dumbledore's Army.
- Peter Pettigrew, despite being a low-ranking soldier for his cowardice and lacking skills, is branded with a Dark Mark. However, he is not given the same respect as the other Death Eaters would receive, and is instead treated as a lowly household servant by both his master and his colleagues. Voldemort would use this particular Dark Mark brand shortly after his resurrection to summon his other Death Eaters.
- When Hermione Granger remarked that once the Ministry started hunting down Death Eaters, Sirius Black's lack of a Dark Mark would be evidence that he is not a Death Eater, which meant that bearing a Dark Mark is sufficient evidence.
- When Harry mentions that the Dumbledore's Army coin reminds him of the Death Eaters' brands, he incorrectly refers to the brand as a scar.
- In Harry Potter and the Half-Blood Prince, the Dark Mark is cast by Gibbon in order to lure Dumbledore to the Astronomy Tower. In the film version, the Mark is cast by Bellatrix Lestrange in celebration after Dumbledore's death.
- In the beginning of the fourth film, the skull and snake appear as a green glowing light, while in three later instances, the skull is moulded from the clouds.
- In every film with the Dark Mark in the sky, Death Eaters are shown able to Apparate out of it in clouds of smoke.
- At the near end of the fourth film, when Barty Jr held Harry inside his office, he kept rubbing Harry's wound where Pettigrew cut him, using the blood to form a crude form of the Dark Mark.
- In the books and in the back cover of the Scholastic edition of Harry Potter and the Half-Blood Prince, the Dark Mark is depicted by Mary GrandPré as being a group of green glowing stars, like a monstrous constellation. Otherwise in the movie adaptations, they are either shaped from the clouds or made of glittering green light.
- In the the film adaptation of Harry Potter and the Half-Blood Prince, Draco Malfoy openly displays his Dark Mark to Albus Dumbledore. In the novel, it is not verified that Draco received the Mark, though it was highly speculated by Harry Potter that it was what Draco showed Borgin as a form of intimidation.
- In LEGO Harry Potter: Years 1-4, during the Quidditch World Cup, you can see the shadow of Barty Crouch Jr when the ring of fire comes, Death Eaters stay and attack; however, in the book and movie they flee.
- The Dark Mark has been used on both the J. K. Rowling's Official Site and Pottermore to indicate content of a spoilerish nature.
- During the Second World War, members of the Nazis paramilitary organisation the Waffen-SS had their blood group tattooed on their inner left arm. During the immediate aftermath of the war, this was used to identify fugitive SS men. This may be the inspiration for the Dark Mark.
- During his studentship at Hogwarts, Gilderoy Lockhart shot a holographic image of his own face like the Dark Mark into the air, in an attempt to garner attention.
- Voldemort summoning his Death Eaters by touching their Dark Marks and vice versa seems to be the same, or at least a similar, magic to Credence Barebone summoning Gellert Grindelwald by touching the Deathly Hallows necklace Grindelwald gave him.
- Another potential inspiration is the ancient idea that when a man or woman made a deal with a incubus or succubus to become a witch, they gained a visible mark or blemish on their skin to mark them as one who had made a deal with a demon.
- Harry Potter and the Goblet of Fire (First appearance)
- Harry Potter and the Goblet of Fire (film)
- Harry Potter and the Goblet of Fire (video game)
- Harry Potter and the Order of the Phoenix
- Harry Potter and the Order of the Phoenix (film)
- Harry Potter and the Half-Blood Prince
- Harry Potter and the Half-Blood Prince (film)
- Harry Potter and the Half-Blood Prince (video game)
- Harry Potter and the Deathly Hallows
- Harry Potter and the Deathly Hallows: Part 1
- Harry Potter and the Deathly Hallows: Part 1 (video game)
- Harry Potter and the Deathly Hallows: Part 2
- Harry Potter and the Deathly Hallows: Part 2 (video game)
- Harry Potter and the Cursed Child (Mentioned only)
- Harry Potter and the Cursed Child (play) (Mentioned only)
- Harry Potter: A Pop-Up Book
- LEGO Harry Potter: Years 1-4
- J. K. Rowling's Official Site