GAMMA by Nikolas Mavresis and David Jonathan is a versatile mentalism system that allows you to seemingly see straight through closed, opaque envelopes. This remarkable system can tell you not only where something is located, but also where an object originally came from. This opens the door to a large number of different routines.

For example, a spectator can freely choose a playing card and place it in one of six opaque envelopes while you stand with your back to them. The envelopes may then be extensively shuffled. As soon as you turn around, you can determine which envelope contains the card without touching anything, and then even reveal the exact playing card chosen.

Another routine combines GAMMA with ESP symbols. A chosen card is placed in one of five envelopes containing different ESP symbols. Next, five ESP cards are shown. While the spectator focuses on their symbol, that exact ESP card turns over in their own hands. As a climax, this card turns out to have transformed into their chosen playing card.

In total, you will learn eight routines with diverse themes and classic mentalism plots, including Bank Night, Living and Dead Test, a murder mystery, instant mind reading, ESP effects, and predictions with mind playing cards.

The system is completely self-contained. No switches, extra gimmicks, moving parts, or electronic aids are required. GAMMA is not a real-time peek system, but the instructions do cover three special peek techniques that combine perfectly with the envelopes.

You will receive 12 high-quality, specially manufactured envelopes with numbers and ESP symbols. They are made of sturdy material for long-lasting use and, according to the makers, feel the same whether empty or filled. The envelopes can be handled freely and viewed superficially by the public.

In addition, you get access to an extensive masterclass of over two hours. The principle is quick to learn, while the many applications make GAMMA interesting for both beginner and experienced magicians and mentalists.