4.2.1 Gravity Block Duplication (Patched on 1.16.200).3.2.3.9 All Item Duplication Glitch (patched 1.17.1).3.2.3.4 Chunk memory overflow (Patched 1.15).3.2.3.3 Zombie/Drowned Method (Patched).3.2.3.2 Baby Piglin Item Dupe (Patched in 1.16.3).3.2.2.3 Donkey Inventory Oversight (Patched in 20w16a and in Paper/Spigot 1.15.2).3.2.2.2 Same Player Twice (Patched in virtually every server).3.1.2.5 Piston-based duplication of rails and carpets (Patched on paper).3.1.2.4 Book player-profile rollback glitch.3.1.2.3 Lead Duplication (note: does not work in 1.16.4).3.1.2.1 Explosive fireworks + elytra duplication (MP only).Shulker boxes make item duplication much easier because they allow for up to 1,729 items to be cloned at once (including the shulker box). However, there are other ways to duplicate the blocks themselves, though they only work for certain blocks. The best way to duplicate a block is to turn it into an item first, then duplicate the item. On most servers, duping inventory items is a bannable offense.

Note that these techniques are considered 'cheating' by many people and Mojang tries to remove the ability to duplicate in Survival during almost every update, except for primed TNT duplication, which has been left in on purpose until a suitable replacement exists.

These third-party applications are NOT owned or endorsed by Mojang, so use at your own risk. For Java Edition, this can happen in the Minecraft Launcher, but on Bedrock Edition, you must use third party applications in order to replicate these again.

If any of these do get patched, you must either go back versions or use third-party applications in order to replicate them again. It can be treated as an 'everything farm,' since it can 'farm' things that can't normally be farmed, like block of diamonds, dragon eggs and other non-renewable blocks. This page seeks to teach you how to clone items and blocks without building a separate farm for them, in vanilla Survival mode. When this happens, the contraption will cease to work. Bugs of this nature may be fixed at any time without warning.

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