Chapter 500 Opening The Crack
Sitting in his office, Lu Yu took out a purple crystal from his pocket watch.
The entire crystal was clear, without a trace of impurities, looking pure and clean.
"The usage of this crystal is simple. Inject energy into it, and when the energy overflows, it will cause an explosion. After exploding, a crack will be left behind in space. Through the crack, we can contact our original world."
As Lu Yu spoke, he raised the crystal and prepared to inject energy into it.
The most common type of energy was the energy contained in a cultivator's body. Some people called it spiritual power, but it was just a substance that strengthened the human body.
Other than that, there was also elemental energy, such as fire, water, light, and so on.