Java Edition 1.21.9

Java Edition 1.21.9, named The Copper Age, is a minor update to 1.21 for Java Edition, released on September 30, 2025.

Additions[]

Blocks[]

Copper Golem Statue
- A new decorative block composed of waxed and oxidized variants.
- It turns into this state when a copper golem gets fully oxidized.
  - It reverts back to a copper golem if the statue is unoxidized when interacted with an axe.
- The block's pose can be changed by interacting with it.
- Like normal copper blocks, unwaxed copper golem statues undergo 4 stages of oxidation:
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed copper golem statue prevents the oxidation.
  - Right-clicking an unoxidized or waxed copper golem statue with an axe converts the statue into a copper golem.
- Activated pistons push them off as an item
  - Also drop as an item when mined.
Shelf
- A new decorative block comes with all wood variants.
- Can be crafted with six matching stripped logs.
  - Can produce 6 shelves.
- Can store up to 3 item stacks.
  - Interacting them swaps the player's main hand.
- Can display up to 3 items and blocks that contain it, similar to Item Frame.
  - Items appear to be placed on the shelf, instead of being placed in the middle.
Copper Chest
- A new chest variant composed of waxed and oxidized variants.
- Can be crafted with a chest surrounded by 8 copper ingots.
- Acts as its wooden counterpart.
  - Placing it side by side creates a large chest.
- Like normal copper blocks, unwaxed copper chests undergo 4 stages of oxidation:
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed copper chest prevents the oxidation.
- Can be interacted with by copper golems.
Copper Chain
- A new chain variant composed of waxed and oxidized variants
- Requires copper nuggets and copper ingots to craft them
- Like normal copper blocks, unwaxed copper chains undergo 4 stages of oxidation:
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed copper chain prevents the oxidation.
Copper Bars
- A new bars variant composed of waxed and oxidized variants
- Can be crafted with 6 copper ingots.
  - Can produce 16 of them.
- Like normal copper blocks, unwaxed copper bars undergo 4 stages of oxidation:
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed copper bars prevents the oxidation.
Copper Torch
- A new torch variant.
- Gives off green light.
  - Gives a light level of 14.
- Can be crafted with a copper nugget, stick and a coal/charcoal.
  - Can produce 4 copper torches.
- Unlike normal copper blocks, copper torches do not oxidize since it uses wood sound when placing and/or breaking them.
Copper Lantern
- A new lantern variant composed of waxed and oxidized variants
- Gives off green light
- Can be crafted with a copper torch surrounded by 8 copper nuggets.
- Like normal copper blocks, unwaxed copper lanterns undergo 4 stages of oxidation:
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed copper lantern prevents the oxidation.

Items[]

Copper Armor Set
Copper Nugget
- Can be obtained by smelting any copper equipment.
- Can be used to craft copper ingots.
Copper Golem Spawn Egg
- Can be used to spawn copper golems.
Copper Tool Set

Mobs[]

Copper Golem
- A new buildable passive mob in which it undergoes oxidation, like normal copper blocks.
- Can be spawned by placing a Carved Pumpkin or Jack o'Lantern block on top of a copper block.
  - Can also be spawned by using its Spawn Egg or by its /summon command.
  - Spawns with a copper chest
- Only interacts with chests, trapped chests and copper chests.
- Can pick up a maximum of 16 items in a stack at a time.
- Like all copper blocks, unwaxed copper golems undergo 4 stages of oxidation:
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized - Statue stage
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed copper golem prevents the oxidation.
- When a copper golem gets fully oxidized, it will turn into a copper golem statue.
- Drops 1-3 copper ingots on death.
- Prior to this update it was featured in Minecraft Live 2021's Mob Vote, but was lost to Allay.
Mannequin
- A new NPC wearing a slim Steve skin.
  - The NPC's skin can be customised via commands; however, the block and mob textures appear broken.
- Does not have its own spawn egg.
- Only summoned via commands.
- Can hold items, blocks; wear armor and elytra; and have attributes and effects.
- Has 20 hearts of health similar to the player.

Language[]

Now supports the Halychian language.

Changes[]

Gameplay[]

Menu
- Changed the panorama to show copper golems wandering around a village.

Blocks[]

Lightning Rods
- Now undergo 4 stages of oxidation, like all copper blocks.
  - Unoxidized - Normal stage
  - Exposed
  - Weathered
  - Oxidized
- Only lightning and axes can revert the oxidation process.
  - Using a honeycomb on an unwaxed lightning rod prevents the oxidation.
Copper Trapdoor
- Now requires 4 copper ingots to craft, since 6 copper ingots craft copper bars.
Chain
- Now renamed as "Iron Chain" to avoid confusion with copper chains.
Signs and Hanging Signs
- Has a new object text component
  - Can only be accessible by commands

Items[]

Dyes
- Changed the texture icons of all color dyes to support colorblind accessibility.

Mobs[]

Iron Golem
- Sometimes plants a poppy on the copper golem.

Dimensions[]

The End
- Now has a new skylight called "end flashes".
  - From time to time, bright purple light flashes in the End.
  - Was a feature introduced in Bedrock Edition, during the development of Vibrant Visuals.