Minecraft wiki entry for Advancement_guide, associated text: Be near a beacon when it is powered by a full-size level 4 pyramid. To acquire this, place blocks of iron, gold, diamonds, emeralds and/or netherite on the ground in a 9 x 9 layout. Place another layer of minerals blocks on top of that in a 7 x 7 layout, and another on top of that in a 5 x 5 layout. Finally, your final layer should be 3 x 3, and you can place your beacon on top of this. Once the beacon shoots its beam to the sky, you will get the advancement. A level 4 beacon can also give special and rare powers to the player, if opened and given a type of mineral.