The Minecraft Command User

York used to come in first on every exam. Now he's in the world of his favorite game, Minecraft. There's only one way out: become a Command User. To do that, he needs three command blocks: the green one from the Overworld, the red one from the Nether, and the purple one from the End. But plenty of people have their eyes on the command blocks. Can York become a Command User and return to the real world?