Glossary of Magic (illusion) - I

I

• Invisible Deck - Classic effect by magician Don Alan in which a card merely named by the spectator is the only one face down in the face-up deck. Many magicians use the Invisible Deck as a backup plan if something goes wrong in the middle of a routine. Similar to a Brainwave Deck, in which a thought-of card is revealed face-up in a face-down deck--and has a different colored back.
• Impromptu - a trick that can be performed at a moment's notice, usually with everyday objects and little or no preparation.