MIND MARKER by Max Vellucci - Trick
Thanks to this tool you can decide, at any time, when to let the marker write or not, allowing you infinite possibilities.
With Mind Marker you can force anything and create incredible predictions and mind reading effects, simply applying it to any magical context, from card magic to mentalism.
The power of ink is finally in your hands and it's up to you to decide whether to use it or not.
A simple, immediate and, above all, incredibly effective system.