Minecraft 1.21: The End Update

Minecraft Java Edition 1.21, also known as "The End Update", was a major update that overhauled The End dimension, as well as a few minor additions to the Overworld.
== Additions ==
=== Blocks ===
==== Block of Biotite ====
* Crafted from 9 Ender Biotite.
* Looks like a black version of Quartz.
* Can be crafted into all of the same building blocks as Quartz (Biotite stairs, slab, smooth block, smooth stairs, smooth slab, chiseled block, and pillar), but colored black.
==== Block of Endium ====
* Crafted with 9 Endium Ingots.
==== Block of Topaz ====
* Crafted with 9 Topaz.
==== Chiseled Nullslate Bricks ====
* Made like Chiseled Stone Bricks, but with Nullslate Brick Slabs.
==== Cracked Nullslate Bricks ====
* Made by smelting Nullslate Bricks.
==== End Topaz Ore ====
* Nullslate with Topaz Ore overlay.
* Drops Topaz.
==== Ender Biotite Ore ====
* Nullslate with Ender Biotite Ore overlay.
* Drops Ender Biotite.
==== Endium Ore ====
* Endstone with Endium Ore overlay.
* Spawns on the bottom of End Islands.
* Drops Endium Shard.
==== Gold Bars ====
* Functionally like Iron Bars, but crafted with gold instead of iron: have a similar texture but yellow.
* Inspired by the Quark mod.
==== Mulch ====
* New block that spawns in Villages, with a one-block radius surrounding the stems of trees that generate in them.
* Can be crafted with a 2x2 of sticks.
* If placed in a one-block radius around a sapling, the tree will grow slightly faster; the perimeter is slightly bugger for saplings placed in a 2x2 grid.
==== Nullslate ====
* Spawns alongside Endstone in small patches on the surface of End Islands, but on on the Main End Island; also makes up the underground block used in End Caverns.
* Can be used in every crafting recipe that Cobblestone, Blackstone, and Cobbled Deepslate can be used in, including repairing stone tools.
==== Nullslate Bricks ====
* Crafted from 4 Nullslate.
* Can be crafted into stairs, slabs, and walls.
==== Growstone ====
* Is the equivalent of Grass Blocks in the Overworld, or Nylium in the Nether.
* Is the only End block that Putrid Fungus can be placed on (It can also be placed on Dirt, Grass, and other dirt blocks.)
* Spawns on the top layer of Putrid Forests.
==== Polished Nullslate ====
* Made from a 2x2 of Nullslate.
* Can be crafted into stairs and slabs.
==== Putrid Wood Type ====
* Can be used to make all wood things, except Boats/Boats with Chests.
==== Putrid Hide ====
* Is a type of leaf that spawns on Huge Putrid Fungi.
==== Putrid Fungus ====
* Can be placed on Overgrown Endstone, Grass, Dirt, and other dirt/grass blocks.
* Grows into Huge Putrid Fungus.
* Like Chorus Plant, it cannot be bonemealed to speed up the growth.
* Nether.
* 
==== Shrill Campfire ====
* Is functionally a Campfire, but the fire is green.
* Crafted like a Soul Campfire, but with Shriller Essence instead of Soul Soil.
==== Shrill Fire ====
* Is functionally Fire, but it doesn't burn blocks, and is green.
* Is a Flint and Steel is used on top of Nullslate, the fire will be Shrill Fire.
==== Shrill Lantern ====
* Is functionally a Lantern, but the light is green.
* Crafted like a Soul Lantern, but with Shriller Essence instead of Soul Soil.
==== Shrill Torch ====
* Is functionally a Torch, but the light is Green.
* Crafted like a Soul Torch, but with Shriller Essence instead of Soul Soil.
=== Items ===
==== Ender Biotite ====
* Drops from Ender Biotite Ore.
* Can be crafted into a Block of Biotite, and therefore all the Biotite decoration blocks.
* Crafting recipes for Redstone Comparators, Daylight Sensors, Diorite, Granite, and Observers cannot use Ender Biotite as a substitute for Nether Quartz. 
==== Endium Ingot ====
* Crafted from 9 Endium Shards.
* Can be used to make a Block of Endium.
* Using a Smithing Table and Endium Ingots, Netherite Armor/Tools can be upgraded to Endium.
==== Endium Shard ====
* Drops from Endium Ore
* 9 Endium Shards can be crafted into an Endium Ingot.
==== Shriller Essence ====
* Drops from Shrillers upon death. 
* Can be used to craft Shrill Torch, Campfire, and Lantern.
* 
==== Topaz ====
* Drops from End Topaz Ore.
* Can be used to make a Block of Topaz.
* Is used for trading with Silkers.
=== Biomes/Generation/Structures ===
==== Putrid Forest ====
* Contains Huge Putrid Fungi.
* Top layer is Growstone.
==== End Caverns ====
* Caves in the End.
* Contain exposed ores.
* Made of Nullslate 
=== Mobs ===
==== Shriller ====
* Passive flying mob.
* Spawns in the Putrid Forest.
* Makes an annoying shrieking noise sometimes.
* Breeded with Putrid Fungus.
=== Advancements ===
==== Serious Dedication ====
* "Use an Endium Ingot to upgrade a hoe, and then reevaluate your life choices."
* Changed to being unlocked when the player has an Endium Hoe in their inventory, rather than a Netherite Hoe.
==== But in the End, it doesn't even Matter ====
* "Obtain an Endium Ingot."
* Unlocked when the player has an Endium Ingot in their inventory.
==== All Set ====
* Challenge Advancement.
* "Get a full suit of Endium Armor."
* Unlocked when the player has every piece of Endium Armor in their inventory.
==== The Parrots and the Bats ====
* "Breed two animals together."
* You can now unlock this advancement by breeding two Shriller.
==== Two By Two ====
* "Breed all the animals!"
* Shriller added to one of the animals you have to breed to unlock this advancement.