Curses are an area rarely studied by wizards, and in this regard, Voldemort is the forerunner of all wizards. He had placed a powerful curse on the position of Defence Against the Dark Arts professor at Hogwarts School of Witchcraft and Wizardry, so that every wizard could not serve for more than a year, in retaliation for Albus Dumbledore for refusing him to be a single man.

At the height of Voldemort's power, he also cursed the title "Voldemort", exposing the location of any wizard who uttered the title to the Death Eaters. Of course, Voldemort's most important or terrible curse is all in his proudest magical treasure--- the Horcrux!

On the night of the Potters' deaths, wizards were curious about why Harry Potter survived, and the wizarding community wondered how Harry Potter escaped from the Avada Curse. Albus Dumbledore and other top wizards were concerned about what happened to Voldemort, Albus Dumbledore was sure that Voldemort would return, and when Severus Snape confided in the Headmaster in pain, the Headmaster was sure that the Dark Lord would make a comeback.

Voldemort really made a comeback. Of course, there are some difficult things to explain, but the most important thing is undoubtedly Horcruxes.

The Headmaster had also seen the Mirror of Eris, which revealed the wizard's greatest wishes, and when Harry Potter asked him when he saw it, Albus Dumbledore had apparently lied. Voldemort infused his Horcruxes with an extremely powerful and deadly curse, and if it had been in the original world, Albus Dumbledore would have died in the terrible curse attached to the ring.

Draco Malfoy also attempted to assassinate Albus Dumbledore by carving a curse on an opal necklace, but was unsuccessful.

The main reason why the powerful spells of the wizarding world cannot be passed on is also due to Merlin's curse, which is one of the most dangerous spells in the wizarding world, probably because this magic involves a magical world that wizards completely cannot understand.

So when Mira was cursed by the monsters on the Hanging Island, Zhou Shang suddenly became extremely nervous, any curse could be fatal, let alone a curse in this kind of place. The gray finger-like marks on Mira's arms, as well as the slowly turning blue-gray blood vessels, reminded everyone that they were not facing an ordinary curse at all, but a powerful demonic curse inherited from ancient China.

"No, this curse is too complicated, I can't understand it at all, we must find the professors immediately, maybe they have a way!" Beads of sweat appeared on Zhou Shang's forehead, he tried a few spells, but nothing worked, and the terrible traces were still spreading.

Cedric Diggory waved his wand, "Summoning Alarm!" as he tried to make contact with the professors, and a silver ball of light erupted from his wand, spun around in the void, headless like a fly, and finally returned to Cedric Diggory's side. Cedric Diggory looked embarrassed. "What? Could it be..."Although Fleur already had an ominous premonition in her heart, she couldn't help but twitch when she saw Cedric Diggory finally confirm it.

"Failed! The spell can't reach the professors, so I'll try to call the gods again. Cedric Diggory summoned his Patronus, but he tried several times, but failed, "The Patronus seems to have been suppressed by something, and he can't summon it at all!"

Zhou Shang and Furong also tried it, but there was no response, the feeling seemed that the connection between the patronus and the wizard had been severed, and they couldn't feel the position of their patronus at all.