Well, now that was an introduction. Nigel still wanted some ice cream though. And some Pie but that could wait. He did hear that one hufflepuff made some awesome pies. He did not want to do the math. But he did get the summary of her introduction/speech.

"Well, the the horn and tail hair of a unicorn"

Nigel knew they were used in potions. It must be because they do no harm to the unicorn.