Helix Case by Jeki Yoo"Helix Case" is a powerful and visual opening effect from one of magic's most creative thinkers, Jeki Yoo. Taking a nostalgic toy we all remember from our childhood and turning it into the perfect way to produce a deck of cards from nothing. Here's what happens: You begin by casually playing with a slinky. It is stretched, bounced, and openly displayed as empty. With the slinky resting in your palm, you give it a gentle shake, turn it over, and a