Nylium

Not to be confused with Mycelium.

"Nether Grass Block" redirects here. For the main ground block in the overworld, see Grass Block. For other uses, see Grass (disambiguation).

Nylium

Renewable	No‌[Java Edition only] Yes‌[Bedrock Edition only]
Stackable	Yes (64)
Tool
Blast resistance	0.4
Hardness	0.4
Luminant	No
Transparent	No
Flammable	No
Catches fire from lava	No

Nylium is a variant of netherrack that generates in the Nether. It has two variants: warped nylium and crimson nylium which both spawn in different biomes.

Obtaining

Natural generation

Warped nylium generates in the warped forest biome, and crimson nylium generates in the crimson forest biome.

Breaking

Nylium only drops itself when mined with a pickaxe enchanted with Silk Touch; if mined with a normal pickaxe, it drops netherrack. If mined without a pickaxe, it drops nothing. Nylium is also dropped when an enderman dies while holding it.

Block	Nylium
Hardness	0.4
Tool
Breaking time
Default	2
Wooden	0.3
Stone	0.15
Iron	0.1
Diamond	0.1
Netherite	0.1
Golden	0.05

Chest loot

Item	Structure	Container	Quantity	Chance
Java Edition
Crimson Nylium	Bastion remnant	Hoglin stable chest	2–7	22.8%
Bedrock Edition
Crimson Nylium	Bastion remnant	Hoglin stable chest	2–7	22.8%

Post-generation

Using bone meal on netherrack that is placed next to or adjacent to warped or crimson nylium transforms the netherrack into nylium of that type. No block can be above the netherrack during this process. This transformation can also be done by activating a dispenser with bone meal directly into that netherrack block. If both variants are present, there is an equal chance of either being spread.

Usage

Similar to grass blocks and mycelium, nylium decays (based on random ticks) into netherrack when an opaque block is placed above it. However, unlike grass blocks and mycelium, it does not decay underneath water or lava. It decays when covered with snow, which is intentional behavior.

Like mycelium and podzol, mushrooms can remain on nylium blocks in any light level. Huge mushrooms can be grown by using bone meal on mushrooms planted on nylium.

Fungi can likewise be grown into huge fungi using bone meal, though the fungus must be placed on the same type of nylium, or the bone meal will not even be consumed.

Similar to grass blocks, the player can apply bone meal to nylium. This nylium, along with nearby nylium, generate vegetation that occurs in their native biome (crimson nylium generates mostly crimson forest vegetation and warped nylium generates mostly warped forest vegetation), and just like in the native biomes, the opposite type of fungi occassionally generates. The vegetation is generated in a 5x5 area, centered on the nylium block on which bone meal is used.

Note Blocks

Nylium can be placed under note blocks to produce "bass drum" sounds.

Sounds

Java Edition:

Sound	Subtitles	Source	Description	Resource location	Translation key	Volume	Pitch	Attenuation distance
	Block broken	Blocks	Once the block has broken	block.nylium.break	subtitles.block.generic.break	0.85	?	16
	None	Blocks	Falling on the block with fall damage	block.nylium.fall	None	0.5	?	16
	Block breaking	Blocks	While the block is in the process of being broken	block.nylium.hit	subtitles.block.generic.hit	0.25	?	16
	Block placed	Blocks	When the block is placed	block.nylium.place	subtitles.block.generic.place	0.85	?	16
	Footsteps	Blocks	Walking on the block	block.nylium.step	subtitles.block.generic.footsteps	0.15	1.0	16

Bedrock Edition:^{[more information needed]}

Data values

ID

Java Edition:

Name	Identifier	Block tags	Translation key
Crimson Nylium	crimson_nylium	enderman_holdable mushroom_grow_block nylium mineable/pickaxe	block.minecraft.crimson_nylium
Warped Nylium	warped_nylium	enderman_holdable mushroom_grow_block nylium mineable/pickaxe	block.minecraft.warped_nylium

Bedrock Edition:

Name	Identifier	Numeric ID	Form	Item ID	Translation key
Crimson Nylium	crimson_nylium	487	Block & Giveable Item	Identical	tile.crimson_nylium.name
Warped Nylium	warped_nylium	488	Block & Giveable Item	Identical	tile.warped_nylium.name

History

Java Edition
September 28, 2019					Crimson and Warped nylium is announced at MINECON Live 2019.
					Then they use a planks sound.
1.16		20w06a			Added nylium.
		20w07a			Warped nylium now has a 1⁄109 (~0.92%) chance of being offered by piglins when bartering, in a stack size of 1, making it renewable.
		20w09a			Warped nylium now has a 5⁄226 (~2.21%) chance of being offered by piglins when bartering, in a stack size of 1–5.
		20w10a			Warped nylium can no longer be obtained by bartering with piglins, making it no longer renewable.
		20w12a			Nylium can now be fertilized with bone meal to grow roots, fungi and nether sprouts.
		20w16a			Crimson nylium now generates in chests within bastion remnants.
		20w22a			Nylium now drops netherrack, unless broken with Silk Touch, in which case it drops itself.
1.16.2		20w27a			Mushrooms can now be placed and grown on nylium at any light level.
Bedrock Edition
1.16.0		beta 1.16.0.51			Added nylium.
					Nylium can be fertilized with bone meal to grow roots and fungi.
		beta 1.16.0.57			Crimson nylium now generates in chests within bastion remnants.

Issues

Issues relating to "Nylium" are maintained on the bug tracker. Report issues there.

Trivia

• The name is a portmanteau of "Nether" and "Mycelium", the name of the part of a fungus analogous to roots.