【场景再现】
黑魔法防御课上卢平教授(Lupin)讲的是如何祛除幻形怪(boggart)。正如赫敏回答的那样,幻形怪并没有固定的外形,它会变成你心中最害怕的那种东西,也许是一条毒蛇,也许是哪个严厉的教授,也许是对你最致命的场景,这是它最可怕的地方。不过,幸好,祛除它的咒语并不难学——
H: Boggarts are shape-shifters. They take the shape of whatever a person fears the most. That's what makes them so terrifying.
L: Yes. Luckily, a very simple charm exists to repel a boggart. Let's practice it now. Without wands, please. After me. Ridikulus!
S: Ridikulus!
L: You see, the incantation alone is not enough. What really finishes a boggart is laughter. You need to force it to assume a shape you find truly amusing. Let me explain.