Minecraft: Twin Crystals

There is a legend circulating in MC Academy: Behind a locker in the school's Red Stone Engineering Laboratory, there is a tunnel leading underground, leading to a huge underground palace. In this palace, terrifying power that can destroy the world is sealed. I don't know since then, there have been more and more strange phenomena around Moon Valley City. A large number of monsters suddenly appeared, the ground often trembled, and something seemed to be ready to move behind the lockers in the laboratory.