Minecraft wiki entry for Defeating_an_End_city, associated text: You will take a lot of damage when exploring a city, especially from attacks by shulkers and endermen. Therefore, armor is absolutely essential. You should wear a full set of diamond or netherite armor enchanted with Protection IV. Because of the narrow bridges, and the height of the buildings, Feather Falling IV on your boots is almost necessary. Thorns is also recommended, because it will damage provoked endermen when they attack you. However, Thorns has a high enchantment weight, so be sure to add Unbreaking to your armor as well.