Hallucination is a visual effect. It is like a cartoon animation.
Have the spectator to choose one card, then the magician reveals the prediction card.
Is the magic failed? Now it is the amazing moment.
With a Sharpie, you draw the Aladdin Genie on the back of the playing card.
The ink pattern morphs into the selected card magically. You can hand the inked card as a souvenir.