This trick require to learn The Erdnase Color Change.

Effect: You show the spectator a deck and fan it out slowly. Square the deck, and explain that this is a magical deck and it would turn itself face up magically. After you explained, ask the spectator to look at the deck you holding on. (The top card of the deck should be facing down) Cover up the deck with your hand and POOF,the face of the top card is facing up now. And magically, show your spectator the whole deck is facing up!

Method:
1)Before the trick, flip the bottom card of the deck face up at the bottom, leaving the rest of the cards face down.

2)Hold the deck and slowly fan out the deck except the last card(bottom card) to the spectator and telling them all cards is a complete deck and facing down.

3)Misdirect with your talking,and look into their eyes,as no one looking at your hand,turn over the deck so that the bottom card on the top and facing down. The rest of the cards should be facing up.

*The spectators did not know the deck has been turned over,they thought the deck is a normal deck and all are facing down.

4)Ask the spectator to focus and watch. Perform The Erdnase Color Change. Now the top card is at the second and the second card has been switched to the top(facing up).

5)Fan out the deck and showing each card is facing up after you close the deck with your hand. Don't show the second top card. Spread the deck slowly.

Impress them!