Minecraft wiki entry for Player_versus_Player, associated text: Do note that certain servers have plugins that enable obsidian to be destroyed by a sufficient amount of TNT. If that's the case, then set up your TNT cannon and blow up a hole in it. There are bases that have obsidian covered in water, you CAN TNT-cannon in, but before that, either you have to turn that water to cobblestone or you have to fire sand in using the TNT cannon. Then after you've covered the water, fire your TNT in, now you have a hole to enter their base. If these servers do not have these modifications, on servers with the essentials plugin (Basically every factions server), if you sethome in a "dangerous" thing, such as lava and water, it will teleport you to the safest place. Abusing this glitch to get into bases where they have water underneath them or on top of them to prevent from being exploded, you can sethome at the side of the base in the water, walk away and use your command to go to that home, usually, you will be teleported inside of the base, but a way to counter this is to layer your base twice, what this means is you put a second layer around your base that can fit a player on all sides, then create a box inside of there, then even if someone glitches in, they are stuck in the outside layer and cannot get to your chests.