The Howling (1981)

"What about killing it with silver bullets?"

"Oh sure, silver bullets or fire, it's the only way to get rid of the damned things, they're worse than cockroaches. They come back from the dead if you don't kill 'em right, plus they regenerate - y'know what that is? Cut off an arm, cut off a leg, stick a knife in their heart: nothing. They may look dead, but bam, three days later they're as good as new."

"You believe in this?"

"What am I, an idiot? I'm making a buck here; you want books, I got books. I got chicken blood, I got dog embryos, I got black candles, I got wolfsbane."