C'mere is the ancient summoning spell that appears multiple times in the series. The spell causes the thing that you asked for to pop out of thin air. If the requested object is close enough to you it'll merely fly over. You have to be specific when summoning something to make sure that you get exactly whet you want. It'd be a shame if your husband's cake had rat droppings in it. The counter-incantation No,that! is sometimes needed.
The summoning spell is used multiple times within the series by a variety of characters.