Quantum Cube

The Quantum Cube is a weapon used by Aigami in Yu-Gi-Oh! The Dark Side of Dimensions. It originally belonged to Shadi. Using the cube, Aigami can transport people to an alternate dimension, where they will be dissolved and killed. He can also use it to erase people directly, as well as create a Duel Disk.

It appears to run on KaibaCorp's VR technology, as Seto Kaiba mocks his effort to disintegrate him with his own power and counteracts it. How it works is never fully explained, as Shadi used it to kill people before KaibaCorp's technology existed.