Fellow Craftians, If you happen to find a strange looking block lying around, resembling a Rubik's cube- DO NOT TOUCH IT! Don't open it, hell you'd best dump it in lava!
If you happen to solve the cube, they will come, they will rip you apart, and then they'll leave, waiting for the next poor fool to stumble across the Box.

Craftians, He is Pain! The leader of the creatures from the Box, known as Cenobites, coming from a place far worse than the Nether, some simply call it - Hell.

The walls open, and the light shines!
Enter Pinhead!