The ghost researchers tried to manipulate the power of ghosts to create a golem. Filling its body with magical energy as if blood, and pumping it with oil to make it move. And to control its weight with magic. But it proved nonsensical. Its magic supply would be cut off if it just jumped five meters away. However, where it was made usable it would become a terrifying weapon.
The Ghost Researchers created a special contract paper. The moment one writes their name, the document begins to glow and split into two. To annul it, you would need to burn both of the copies at the same time. However, as long as the other party is living, destroying the document is impossible. It will merely restore itself to how it was before.
The Ghost Researchers created a copying machine, however, it rejects magic manuscripts.