Minecraft wiki entry for The_End_(biome), associated text: This biome is used to generate the circle of radius 1000 centered at the 0,0 coordinates in the End. The End central island is generated at the center of this circle, surrounded by emptiness all the way to the edge of the biome. Most of the End features are exclusive to here, including the ender dragon, the obsidian pillars, the end crystals, the 5×5 spawn platform, the exit portal, and the 20 central end gateways. Only endermen spawn in this biome, but at much higher rates than the Overworld. There is no weather or daylight cycle in the biome, like the Nether. End gateway portals generate after the ender dragon has been defeated. If the biome is used for a superflat world, the sky appears nearly black, no exit portal generates and endermen are the only mobs to spawn at night. In Java Edition, this is the biome that occupies the least part of the map in the game: a circular radius of 1000 blocks, making it cover 3.5 billionths of the entire dimension, even less than the modified jungle edge in the Overworld. In Bedrock Edition, this biome is instead the biggest, as it is used to generate the whole dimension.