Soph shows her to the kitchen table, where she's got a bunch of rather witchy stuff laid out. There are crystals and little sachets of herbs and a spiraly seashell.

"If I do this right," she says, "the seashell will be able to turn into a knife that can cut through anything, and back, when Bella wants. It'll be less obtrusive than taking a regular knife everywhere - she'll still need wood stuff for vampires, unless I manage to make the knife long enough to cut off their heads, but not everything's vampires. And if I do it right, the shell will glow when the spell's done."