Glassandra is not a trick.
Glassandra is the ultimate prediction device, so versatile you will find literally hundreds of applications.
Imagine a prediction that is isolated in a glass, covered with a silk. You never have to touch the glass and yet you can predict playing cards, drawings, colors, money or whatever you can imagine.
You freely and openly remove the cloth, have the spectator take the scroll from the glass – and your prediction will be 100% correct. Every time!