Minecraft wiki entry for Multiplayer_PvP_bases, associated text: Bring as many people and give each person an Impaling V/Riptide trident and full enchanted netherite armor. Each person should bring a netherite sword with enchantments. Have one person carry a full inventory of splash potions of water breathing and healing. Have another person wear aqua affinity and respiration turtle shell, use an Efficiency V pickaxe to break the walls. The person with potions should splash the miner with water breathing. Everyone else fights the guardians and protects the miner. When the walls are broken (Which should take several real life hours due to mining fatigue, and let assume somehow the base owners haven't returned yet), team up to fight the large amounts of drowned. Once the drowned are dead, destroy the nether portal. Raid the base, but don't kill the elder guardians. When you exit, fill in the hole you mined with obsidian. Don't make too much damage to the outer structure, or else the owners will find out. This method will surprise the owners when they see the nether portal is broken. If they try to get back in from the outside, they will be very surprised that have mining fatigue and can't get in, and later realizing that their items and drowned army are missing.