You will get
Borrow a deck of cards which you remove from the case. The deck is placed on top of the card case.
Without touching the deck at all you slowly remove the case from under the deck until it no longer supports it. The cards are just flowing in mid air. The top card is removed to pass under the floating deck to proved there are no connections between the deck and the table.
Finally, without touching the cards at all, the case is pushed back under the deck. All is left for immediate examination.
Hover is a great opening effect to any card routine. Use any deck of cards. Special gimmick supplied.