Since mercury is movable, it can move to either side of the dice. For example, if you want to get 6 points, you only need to face down 1 point, and then know it gently, then mercury will move to the side of one point. And under the influence of gravity, the point of six always face up.
Mercury is a special metal liquid that can be added to the dice to balance the dice. It looks like a normal dice, but the inside of the dice , have hollow chamber, containing mercury. This small modification makes the dice asymmetrical. The face-up accuracy rate is 80%, depending on the previous state. You will find that you put the dice on the table for a few seconds, if the point is number 4, then when you throw it , it will become NO.4
The dice contains mercury. If you want to get point 6, you should need to throw the mercury dice and keep point 6 up, when the mercury flow to opposite position of point 6,so you can get point 6 immediately