Menger Sponger, the newly invented device used by the team of scientist to capture the energy of a ghost of SILK, is inspired by a true scientific event. A group of Japanese scientists have become the first to successfully trap electromagnetic waves of a certain frequency inside a tiny cube full of holes - the Menger Sponge - for one ten-millionth of a second.

Yoshinari Miyamoto, Director of the Smart Processing Research Centre at Osaka University, who heads the Menger Sponge project, said the effect of trapping energy is similar to that of a black hole in outer space, except on a smaller scale. Even though the trapping effect is of short duration, it is enough for modern applications.