Minecraft wiki entry for End_survival, associated text: In the End, the player can still make many of the farms they would typically make in the Overworld. One of the most important farms to make is a cobblestone generator. Here are two different designs for cobblestone generators that both require 1 lava bucket and 1 water bucket. The first design only generates one block at a time, while the second design can generate 4 blocks at the same time, making it far more efficient than the other one.