Existem muitos feitiços que podem ser considerados "contra-ataques", na medida em que negam ou invertem os efeitos de uma maldição.
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Snape parece saber um contra-ataque para Sectumsempra :
Embora isso possa ser simplesmente um feitiço de cura genérico, o fato de Snape ter inventado Sectumsempra , e não deixar de ter uma contracultura para sua outra invenção, Levicorpus , sugere de outra forma.The door banged open behind Harry and he looked up, terrified: Snape had burst into the room, his face livid. Pushing Harry roughly aside, he knelt over Malfoy, drew his wand, and traced it over the deep wounds Harry’s curse had made, muttering an incantation that sounded almost like song. The flow of blood seemed to ease; Snape wiped the residue from Malfoy’s face and repeated his spell. Now the wounds seemed to be knitting.
—Harry Potter and the Half-Blood Prince
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A mágica impressionante ( Stupefy ) pode ser revertida por Rennervate :
“Stunned,” he said softly. His half-moon glasses glittered in the wandlight as he peered around at the surrounding trees.
“Should I go and get someone?” said Harry. “Madam Pomfrey?”
“No,” said Dumbledore swiftly. “Stay here.”
He raised his wand into the air and pointed it in the direction of Hagrid’s cabin. Harry saw something silvery dart out of it and streak away through the trees like a ghostly bird. Then Dumbledore bent over Krum again, pointed his wand at him, and muttered, “Rennervate.”
—Harry Potter and the Goblet of Fire
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Levicorpus , claro, teve uma contramágica:
She raised her wand, pointed it at Harry, and whispered, “Levicorpus.”
[...]
“Liberacorpus!” yelled Harry, and with a crash he and Griphook landed on the surface of the swelling treasure, and the sword flew out of Harry’s hand.
—Harry Potter and the Deathly Hallows
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Petrificus Totalus tem algum tipo de countercurse:
There was a flash of red light and Harry’s body unfroze; he was able to push himself into a more dignified sitting position, hastily wipe the blood off his bruised face with the back of his hand, and raise his head to look up at Tonks, who was holding the Invisibility Cloak she had just pulled away.
—Harry Potter and the Half-Blood Prince
É muito possível que este feitiço seja de fato Rennervate , que produziu um efeito similar quando Harry tentou usá-lo para reviver Dumbledore:
“No!” shouted Harry, who had stood to refill the goblet again; instead he dropped the cup into the basin, flung himself down
beside Dumbledore, and heaved him over onto his back; Dumbledore’s glasses were askew, his mouth agape, his eyes closed. “No,” said Harry, shaking Dumbledore, “no, you’re not dead, you said it wasn’t poison, wake up, wake up — Rennervate!” he cried, his wand pointing at Dumbledore’s chest; there was a flash of red light but nothing happened. “Rennervate — sir — please —”—Harry Potter and the Half-Blood Prince
Todos estes parecem envolver um encantamento específico , verbal ou não verbal. No entanto, observe que Harry tentou usar Rennervate em Dumbledore quando estava inconsciente, e Tonks pode tê-lo usado para liberá-lo do Full Body-Bind, então alguns counterspells podem funcionar em múltiplos maldições .
Não parece, no entanto, haver alguma fórmula genérica para counterspells ou countercurses (como dizer as palavras ao contrário), como há em alguns trabalhos.