Each cube has a unique number, obtained once the player opens the gift. Many players sell this item for Money. Some seek cubes with rare numbers.
The cubes can be opened 79 times, each time changing color, and getting smaller by a fraction. On the 80th open, the cube disappears.
Numbers and corresponding colors:
On the 7th of January 2017, it was discovered that the changing colors on the cubes are not random. There is a pattern for how the color changes, each pattern unique for the 25 different numbered cubes. When recording the color-changing pattern of a cube 80 times, the different colors can be organized into an 8x10 area to create a part of a pixelated image. For more info about this, visit Commandhat's blog post.
The usage of the Numbered Cubes are to open up the Shrine of the Sight. The key for how to open the shrine is below.