Upon the vow being completed, if the one who accepted the terms would die if they broke any of them. However, there were a number of circumstances in which the vow could go unfulfilled, but the person would not die.
In J. K. ROWLING's Harry Potter series, an «Un- breakable Vow» is a kind of binding magical ob- ligation between two parties which, if broken, causes the death of whoever broke the obliga- tion.
Harry Potter and the Half-Blood Prince Ron and Harry discuss the spell. An Unbreakable Vow is a magical spell of unknown incantation, in which one witch or wizard makes an oath to another. If either of the two break their terms, they die.
There is nothing forcing the subject of an Unbreakable Vow to uphold their vow. There is a magically enforced penalty for breaking the vow, but no magic stopping you from breaking it, just the fear of death. As such it doesn't actually seem that useful a spell.
Overview. An Unbreakable Vow is a method of making a vow that is magically reinforced. Breaking the vow apparently carries lethal consequences for the one who made it.
Hermione placed it on a piece of parchment signed by all D.A. members so that if any of them betrayed the group, boils would form on his or her face across the cheeks and nose, forming the word "SNEAK".
An Unbreakable Vow (incantation unknown) was a type of binding magical contract cast between two parties, that if broken by either party, would result in the imminent death of whoever broke the contract.
Before the school year even begins, Snape is seen making the Unbreakable Vow with Narcissa Malfoy, swearing on his life to help Draco in the mission Voldemort has given him.
Malfoy spots Harry and casts a Cruciatus curse; Harry, defending himself, using the Half-Blood Prince's Sectumsempra spell without knowing its effects. To his horror, it gashes Draco's face and chest, spilling his blood everywhere. Moaning Myrtle flies off, screaming.
Family. Snape's family background is mostly shown in flashbacks during the course of the last three novels. Snape was born to Eileen Prince, a witch, and Tobias Snape, a Muggle, making him a half-blood (hence the name, "Half-Blood Prince").
Sectumsempra was a curse invented by Severus Snape that lacerated the target and caused severe haemorrhaging. Snape created it as a student of Hogwarts, with the intention of using it against his enemies, likely including the Marauders, with it becoming one of his specialities.
Despite her beliefs and her family's close ties to Lord Voldemort and the Death Eaters, Narcissa never joined the organisation herself, nor received the Dark Mark. While she treated most people coldly, Narcissa was very loving towards her family as well as devoted to them.
Harry used the Imperius Curse multiple times during the Gringotts heist to accomplish their mission. Harry never used the Killing Curse, Avada Kedavra, due to his moral stance against murder and his personal connection to its victims.
However, to spare Draco's soul from being forever tainted by committing murder, Dumbledore pre-arranged his own death with Snape. Voldemort intended Draco to die in the attempt to kill Dumbledore so that Lucius would be punished for his failure to retrieve the prophecy from the Ministry of Magic.
Why did Snape hate Hermione? I think Snape was probably initially impressed with Hermione, but later frustrated with her, for a few reasons. Hermione was very book-smart and could come up with answers quickly, but didn't seem to be very good at improvising or trying to improve on existing Magic.
Many believed he was a villain, and weren't convinced he was actually working for Dumbledore. Snape killed Dumbledore in an effort to protect Draco Malfo and spare him from the emotional trauma of murder. Snape used the Killing Curse (Avada Kedavra) to kill Dumbledore and end his suffering.
Draco is in his own house. He is his godson and the child of his good friend Narcissa and fellow former death eater Lucius. He is fond of Draco if you could call it that. He doesn't like Harry at all.
In the Harry Potter and the Deathly Hallows movie, Snape showed how much he loved Harry, providing him with his memories and showing that he saw Lily in him, his last words echoing this: "You have your mother's eyes."
Hoping to revive his dead family members (particularly his sister Ariana Dumbledore), he disregarded the ring's status as a Horcrux and put it on. This enacted the ring's deadly curse, and it began to quickly spread through Dumbledore's body, starting with the hand on which he had put the ring.
The blood pact was finally broken when Dumbledore and his brother Aberforth shielded Credence Barebone from Grindelwald's Killing Curse, inadvertently violating the terms of the pact, rendering it void. The blood pact fell to the ground and shattered, instantly enabling the two to duel each other.
While it is unknown exactly which curse Dolohov used, he fired the spell that murdered Remus Lupin. There has been debate over the years on whether Dolohov used the Killing Curse or some equally horrifying curse of his own design. Either way, he caught Lupin off guard, and his life was forfeit.
Lupin was killed by Dolohov. According to Word of God, this was because he had been using magic primarily for hiding and defense, rather than honing his skills as a duelist, and came up against a savage and sadistic Death Eater in Dolohov. Presumably he used either Avada Kedavra or his signature purple flame spell.
In Harry Potter and the Deathly Hallows: Part 1, Bellatrix used her knife to carve the word "mudblood" into Hermione Granger's arm. The film version of the knife bears a resemblance to cross-shaped spearheads that leave a hard-to-heal wound.
