Shuffoil and Water by Rikilin
The most visual and impossible effect of oil and water with the entire deck of cards
Shuffoil and water is a version of the classic oil and water effect, but in contrast to the majority that is usually done with a few cards, shuffoil an water is done with the entire deck, which means even bigger reactions. The spectators freely choose the cards, and they can see that the magician very genuinely shuffle the deck, in any moment there are false shuffles!

No gaff cards
No sticky stuff 
No rough and smooth
No switch of any kind