Magic is used in many different ways in Harry Potter. There are plenty of cute objects and useful items that were created with the help of magic. However, there were also dark and cursed objects created with magic. These items ended up being some of the most dangerous items in the entire franchise, putting people's lives at risk.
Throughout the Harry Potter series, there were numerous cursed objects that threatened our heroes. We're ranking 10 of the most dangerous cursed objects seen in that world. These objects have great power, but they can be used to destroy those who seek to use them.
10 ELDER WAND
The Elder Wand is the most powerful wand in the world, but strength like that comes at a price. When Death crafted the wand, he knew that it would consume whoever wielded it. Just about everyone who used the wand went drunk with power, causing the inevitable death of one of the Peverell brothers.
Grindelwald would later use it to wage war on the Wizarding World before landing in Dumbledore's lap. Albus certainly knew how to use it well, but it likely took a long time before he was sure how to get a handle on it. Knowing how it could change a person, Harry chose to never use the wand.
9 RESURRECTION STONE
When one of the Peverell brothers was given a gift from death, he chose to trick the cloaked entity by having a stone that could bring people back from the grave. However, the Resurrection Stone was a clever ploy by death. It could only bring people back in a certain way.
With their bodies belonging to the afterlife, they could only partially return to the mortal world, mere shadows of what they once were. This made the Peverell brother go insane, as it would likely do to anyone else who tried to use it in the same way. Harry dropped it as well.
8 TOM RIDDLE'S DIARY
Tom Riddle's diary first appeared in Harry Potter and the Chamber of Secrets. Just about every problem that occurred at Hogwarts that year could be traced back to the diary. Being one of Lord Voldemorts' Horcruxes, the diary had a piece of him inside it.
That piece came out, brought the basilisk from the Chamber of Secrets, and began attacking students all around the school. It nearly destroyed Ginny Weasley and Harry Potter. As a matter of fact, if it weren't for the convenient basilisk fang that was embedded in Harry's arm, Tom Riddle's diary probably would've gotten the best of him.
7 SLYTHERIN'S LOCKET
There were all sorts of objects that Voldemort used to make Horcruxes, and one of them was Slytherin's locket. Harry and Dumbledore both tried to find the locket, but they were beaten to the punch by Regulus Black.
Harry and his friends would later steal the locket from Dolores Umbridge in the Ministry of Magic and had to wear it until they found a way to destroy it. The locket had great powers over one's emotions, causing Ron to leave and Harry to constantly lose his temper. When Ron tried to destroy the locket, it responded by trying to persuade him to instead, turn on Harry.
6 VOLDEMORT'S MOTHER'S RING
After the diary, there was only one other Horcrux found before the events of Harry Potter and the Half-Blood Prince: Voldemort's mother's ring. This ring was found by Dumbledore, who found that it contained a deadly curse. The dark magic from the ring spread like an infection in Dumbledore's hand that Snape confirmed would eventually kill him.
While Dumbledore found a way to destroy the ring, it would also destroy his life, causing Voldemort to claim another powerful soul in his war against the Wizarding World. It's a good thing Harry wasn't the one who had to try and destroy it.
5 OPAL NECKLACE
In Harry Potter and the Half-Blood Prince, Harry and his friends come across a strange opal necklace. One of the Hogwarts students was given it to deliver to Dumbledore, but she opened it, which led to her getting bewitched. Had the other wizards not been there, the young girl might've lost her life.
It was later confirmed by Snape that the necklace was so dangerous that it could've killed anyone that touched it. This was an attempt from Draco Malfoy to kill Dumbledore on orders from Lord Voldemort. However, he didn't account that someone else would've opened it before giving it to the headmaster.
4 MIRROR OF ERISED
The Mirror of Erised isn't an innately dangerous object that is filled with dark magic. However, it is a powerful object that can have a negative effect on anyone who looks at it. The mirror shows the looker's greatest desire, whether it be their deceased parents or the Hogwarts House Cup.
When Harry began looking at the mirror, he was met by Dumbledore, who told him that the mirror had caused people to lose their minds. Because it shows the looker's desires, it can cause people to go crazy searching for it, hoping that what they saw would end up true.
3 BLACK QUILL
The Black Quill was a special pen introduced in Harry Potter and the Order of the Phoenix. After Harry had a few outbursts in Umbridge's Defense Against the Dark Arts class about the return of Lord Voldemort, she made him write "I must not tell lies" with the Black Quill.
The pen doesn't use any ink, but it carves into the writer's arm whatever phrase they're writing on paper. Known to be extremely painful, Umbridge was chastised for this punishment. However, she resorted to it as a regular method of discipline after she was made Headmaster of Hogwarts for a short time.
2 RAVENCLAW'S DIADEM
In Harry Potter and the Deathly Hallows, Harry had to return to Hogwarts to find the last Horcrux he and his friends hadn't managed to place. This was discovered to be the lost diadem of Rowena Ravenclaw.
Harry found it in the Room of Requirement, though it wasn't without a fight. After they tried to destroy the diadem, it retaliated by taking over the fire that burned the entire room, threatening to overcome Harry, Ron, and Hermione in an instant (in the movie version). Had it not been for Hogwarts closing up the door to the room, then they likely would've perished.
1 HUFFLEPUFF CUP
The Hufflepuff Cup was arguably the most difficult Horcrux for Harry, Ron, and Hermione to get. While they infiltrated the Ministry of Magic for the locket, they had to break into Gringotts for the cup. As if the curses on the items in Bellatrix's vault weren't bad enough, Ron and Hermione had a rough time when destroying the Hufflepuff cup.
After taking it down to the Room of Requirement, the cup possessed the waters and tried to drown them. Thankfully, the magic had been removed from it quickly enough that Ron and Hermione survived and got out of the chamber safely.