Colm smirked back. "But I wouldn’t be cursing you; because curses can be partly undone. No, Albus Dumbledore, by speaking that sentence, I would be declaring that you broke a binding magical contract. The contract requiring, ever since 1642, to not attack your country’s Muggle government or its sovereign, to not harm Muggle citizens of your country, and to not otherwise abuse your magic that your country’s Muggle government gives you freedom to use. And if I speak that sentence and it takes your magic? Saint Mungo’s will tell you that whenever you break an oath or a contract, and lose your magic from this, nobody and nothing can give you your magic back."