Minecraft wiki entry for Building_a_metropolis, associated text: End Fortress: Build a massive version of end cities in the End using mostly the materials found there, such as end stone bricks, obsidian and purpur. Build rooms and entrances at least three blocks high to allow endermen to enter and build three block long "beds" from wool blocks. Use shulker boxes and ender chests for storage. Add end crystals for mysterious-looking decorations, but be careful not to blow them up. Inhabitants should either have black and purple clothes or just be endermen. Add a chorus plant farm, a harbor for end ships and high towers for flying with elytra. Use end rods for lighting. Outlaw water, and if your rules ever require executions, do it by knocking people into the Void.