Elastic Utility Thread (200 m/218 yards) P&L the deck can't be examined

the deck can't be examined in any way by the audience

5V batteries

Not only is the visual strange and entertaining to watch

2: John Scarne's Triple Coincidence:

It is under you complete control

Elastic Utility Thread (200 m/218 yards) P&L the deck can't be examinedConstructing quality gimmicks demands quality tools. The Murphy's Elastic Utility Thread is a tough, durable, clear elastic thread that can handle almost any application. Each spool contains 656 feet (200 meters) of transparent, elastic thread. The thread has a high tension strength, with a low gloss finish that will keep your thread hidden when in use. No stripping required so you can start using it out of the box. If you are repairing a card gimmick