Mirrorize by Loran

Mirrorize is a classic "Do as I do" effect... but with a twist.

A mesmerizing coincidence occurs with mirror cards in the hands of a volunteer!

No force
Easy to do
Instant reset
You finish clean
Cards are completely examinable
Difficulty: beginner
Effect:

You and a volunteer hold in your hands two packs of five cards each, faces down. You both hold these cards behind your back and randomly choose a card from your respective packs. You and your volunteer exchange cards then replace them face up, in your respective packs.

What a surprise when it is discovered that you and your volunteer have chosen the same card. But that's not all, as a finale all the other cards in both packs are shown to have mirrors on the faces of the cards!