Minecraft 1.21.4 Duplication Glitches: 7 Exploits That Still Work (Deep Dive!)
Think Mojang patched all the good stuff? Think again! We’ve tested every corner of Minecraft 1.21.4 and discovered seven incredible duplication glitches that still let you bypass grinding and dominate your world. From infinite emeralds to breaking Bedrock itself – here’s your ultimate cheat sheet (shhh, don’t tell the devs!).
1. Tripwire Hook Duplication – Emerald Factory 2.0
- Visual: Simple redstone build with trapdoors and tripwire hooks
- How to: Place new hooks on left trapdoor repeatedly
- Pro Tip: Trade duplicates with Fletcher villagers for infinite emeralds post-raid farm nerf!
2. End Portal Frame Removal – The Mushroom Miracle
- Visual: Ancient stronghold blocks disappearing under mushroom power
- How to: Place mushroom on frame edge and watch magic happen
- Legacy Alert: Works since 2011 – now considered a “feature”
3. Gravity Block Duper – Sand Savior
- Visual: Falling blocks looping endlessly over portal frames
- How to: Place fences under portal, drop sand/gravel/anvils
- Game Changer: Produces 500k+ blocks/hour – perfect for mega builds
4. TNT Duplication – The OG Exploit
- Visual: Coral-powered flying machine dupers
- How to: Build updated 2-year-old design for zero-resource quarrying
- Pro Tip: Essential for perimeter digging and cobblestone farms
5. Carpet Fuel Duplication – Furnace Hack
- Visual: Endless carpet flowing from piston machines
- How to: Compact designs produce 500k carpets/hour
- Bonus: Single carpet smelts 0.5 items – infinite fuel!
6. Rail Duplication – Trackmaster’s Dream
- Visual: Slime blocks yeeting rails into existence
- How to: Observer/piston combo bypasses gold requirements
- Speed Hack: Curved rails hit 14 blocks/sec (40% speed boost!)
7. Nether Roof Access – Bedrock Breachers
- Visual: Ender pearl teleportation through ceiling
- How to: Pistons + TNT create permanent Bedrock holes
- Pro Tip: Build gold farms in unlimited space above Nether
Why These Glitches Matter
Mojang’s 1.21.4 update left these golden opportunities intact – use them to skip tedious grinding and focus on creative builds. Whether you’re stocking shulker boxes or constructing mega bases, these exploits are your secret weapon.
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