This fine Wednesday brings 24w13a, a snapshot containing changes to the Mace, Trial Chambers, and introduces the new Ominous Trials!

You might just be inclined to try out the ominous new features of this snapshot. ...or else? Did I do that right?

Happy mining!

Note: some of the features below will only work in freshly generated Trial Chambers.

Experimental Features

Changes to the Mace
Tweaks to the Breeze and Wind Charges
Redesigned Bad Omen
Added Ominous Bottle
Added 6 new mob effects
Added Ominous Trial Spawner
Added Ominous Vault
Added Ominous Trial Key

Mace

Added a new explosive particle effect when executing a smash attack with the Mace to really show the player's power
Increased the power and range of the knockback effect from a smash attack
Introduced an even stronger knockback when falling for more than 5 blocks before attacking
When successfully striking a target, all vertical momentum will be reset in addition to negating any accumulated fall distance
The baseline additional damage dealt by the Mace smash attack has been slightly reduced to 3 (1.5 hearts) per fallen block
These existing enchantments can now be applied to the Mace:
- Mending
- Unbreaking
- Smite
- Bane of Arthropods
- Fire Aspect
- Curse of Vanishing
Three new enchantments have been introduced that are unique to the Mace:
- Density:
  - Common Enchantment, accessible in the Enchanting Table and on Enchanted Books in loot
  - Has 5 levels
  - Maces enchanted with Density do more damage per fallen block per Density level
    - Damage dealt per fallen block is increased by 1 per level of Density
- Breach:
  - Rare Enchantment, accessible in the Enchanting Table and on Enchanted Books in loot
  - Has 4 levels
  - Maces enchanted with Breach reduce the effectiveness of armor on the target
    - The effectiveness of the armor is reduced by 15% per Breach level
- Wind Burst:
  - Unique enchantment which can only be found in Ominous Vaults
  - Has 3 levels
  - Maces enchanted with Wind Burst will emit a Wind Burst upon hitting an enemy, launching the attacker upward and enabling the linking of smash attacks one after the other
  - Each level will bounce the attacker higher up in the air

Breeze & Wind Charges

The Breeze now avoids jumping into dangerous blocks or air
Wind Charges no longer collide with End Crystals

Ominous Events

Bad Omen has been expanded to give access to an optional experience in Trial Chambers
These optional experiences accessed through Bad Omen are now known as Ominous Events
- They are more challenging than usual, and are designed to shake up the experience in unique ways
- Illager Raids are an example of an existing Ominous Event
Bad Omen is getting some changes with this redesign:
- It has a new, shadowy icon and a sound for being applied to the player
- It no longer triggers a Raid directly when entering a village
  - Instead, it will transform into a Raid Omen variant with a duration of 30 seconds
  - Once the Raid Omen expires, a Raid will start at the location the player gained the Raid Omen
  - Like any other effect, players can drink a Bucket of Milk to clear the Raid Omen to prevent the Raid from starting
- It is no longer given to players that defeat a Raid Captain outside a Raid
  - Instead, players can gain access to Bad Omen by consuming a new Ominous Bottle

Ominous Bottle

An item which can be consumed by players to receive the Bad Omen effect for 1 hour and 40 minutes
- Comes in 5 variations, one for each Bad Omen level
- The bottle breaks when consumed
- Can be stacked to 64
Can be found uncommonly in any Vaults that are unlocked with Trial Keys, and is dropped by Raid Captains when defeated outside a Raid

Ominous Trials

A new Ominous Event that can be accessed by exploring a Trial Chamber with Bad Omen
This event will have players facing more powerful Trial Spawners if they dare!

Trial Omen

A variant that Bad Omen can transform into
- This occurs when the player is within detection range of a Trial Spawner that is not Ominous
- The Trial Omen has a duration of 15 minutes multiplied by the transformed Bad Omen's level
Players that have Trial Omen are surrounded by ominous particles

Ominous Trial Spawner

A more powerful active phase of the Trial Spawner with unique challenges and rewards
- Provides a more challenging experience that advanced players can opt into for better rewards
If a Trial Spawner detects a player that has the Trial Omen effect, the spawner will become Ominous if:
- It is not in cooldown
- Or, it is in cooldown but was not Ominous during its last activation
  - Making it Ominous this way will bypass the cooldown
While active, it will:
- Glow blue instead of orange
- Emit soul flames instead of normal flames
- Very commonly spawns mobs with equipment if they can wear it
  - The equipment these mobs wear have armor trims applied from the Trial Chambers
  - Known issue: these mobs can currently drop their equipment on death, but they will not in the future
- Periodically spawn potions and projectiles on top of unsuspecting players and mobs
  - Based on their location, spawners in an area will select a random set of projectiles to spawn
  - These projectiles will always include a single type of Lingering Potion from a set of possible effects
Becoming Ominous will despawn any existing mobs it spawned and reset its challenge
- It will stay Ominous until it has been defeated and its cooldown has finished
When defeated, it will eject a different set of loot to normal Trial Spawners

Ominous Trial Key

A new variant of the Trial Key which can only be obtained by defeating an Ominous Trial Spawner
They can be used to unlock Ominous Vaults

Ominous Vault

A variant of Vaults that have a different texture and emit soul flames instead of normal flames
These can be found throughout the Trial Chambers in harder to find places and require an Ominous Trial Key to unlock
- These Vaults hold a more valuable set of rewards than the standard Vaults unlocked by Trial Keys

Mob Effects

The following effects have been added:
- Wind Charged
  - Affected entities will emit a wind burst upon death
  - Brewed with an Awkward Potion and a Breeze Rod
- Weaving
  - Affected entities will spread Cobweb blocks upon death
  - Non-player entities with this effect can walk through Cobweb at normal speeds
  - Brewed with an Awkward Potion and a Cobweb block
- Oozing
  - Affected entities will spawn two Slimes upon death
  - Brewed with an Awkward Potion and a Slime Block
- Infested
  - Affected entities have a 5% chance to spawn 1-2 Silverfish when hurt
  - Brewed with an Awkward Potion and a Stone block
These effects can be encountered while taking on an Ominous Trial Spawner
Some mobs are immune to these effects
- Slimes are immune to Oozing
- Silverfish are immune to Infested

Trial Chambers Loot

The loot found within Trial Chamber Vaults has been adjusted
Standard Vaults will give slightly less items of high quality, but also include the following changes:
- Ominous Bottle I - II can be found
- Flow Banner Pattern, Flow Armor Trim Smithing Template, and Heavy Core can no longer be obtained
  - Guster Banner Pattern and Bolt Armor Trim Smithing Template remain exclusive to standard Vaults
  - In Heavy Core's place, standard Vaults will instead have a very rare chance of providing a Trident
Ominous Vaults can provide some particularly valuable items, to mention a few:
- Ominous Bottle III - V
- Enchanted Golden Apple
- Flow Banner Pattern and Flow Armor Trim Smithing Template
- Wind Burst, Breach and Density Enchantments for the Mace
- Heavy Core
The loot ejected from Trial Spawners have been adjusted
- It now has a focus on providing higher quality food more often to make replenishing between fights more safe
Ominous Trial Keys have a 30% chance of ejecting from a defeated Ominous Trial Spawner, replacing the usual 50% chance to eject Trial Keys

Trial Spawner

All spawners now increase the amount of mobs present at once by 0.5 for each additional player, down from 2
Baby Zombie spawners now only have 2 mobs present at once for its baseline, down from 3 mobs
Can now only activate when a player is in line of sight

Trial Chambers

Remade chamber_5 with variations, and renamed it to eruption
Reduced amount of Trial Spawners in corridors
Updated layout and placements of Vaults
Placed Ominous Vaults in chambers, intersections, at the ends of corridors
Corridors will no longer generate endlessly
Added an atrium to the corridors
Made various layout changes in intersections and corridors

Known issues:

Corner quadrants in slanted may still fail to generate correctly

Changes in 24w13a

Added unique sounds for Cobwebs

Technical Changes in 24w13a

The Data Pack version is now 37
The Resource Pack version is now 31
Client chat state is now preserved by default when entering configuration phase
Changes to chat network protocol

Chat

Client chat state (on-screen messages and chat input history) is now preserved by client when entering and exiting configuration phase
Message signature chain handling remains unchanged - going into configuration phase starts new session
If client has message delay configured, pending messages will be delivered immediately before leaving world
Server can clear chat state by sending reset_chat packet in configuration phase

Network Protocol

The minecraft:chat_command_signed packet has been split from minecraft:chat_command
- Commands that do not accept any signed arguments will use the unsigned packet, and will not pass any 'last seen' chat updates

Data Pack Version 37

Added new loot table type minecraft:equipment
- Has required parameters of this_entity and origin
  - this_entity : the mob that is about to be given equipment
  - origin : the position of the mob
Added optional equipment_loot_table to the spawn data present in the SpawnPotentials of Monster Spawners and spawn_potentials of Trial Spawner configs
- If present, rolled items from the specified loot table will be equipped to the mob that spawns
Modified copy_components and set_name loot function arguments
Added new set_ominous_bottle_amplifier loot function
Added new item components
Non-default components on item stacks are now stored when block entity is placed
Int and float providers used in worldgen definitions are no longer wrapped in an extra value field next to type
- For example, {"type":"minecraft:uniform","value":{"min_inclusive":0.0,"max_inclusive":1.0}} becomes {"type":"minecraft:uniform","min_inclusive":0.0,"max_inclusive":1.0}
New Damage Type Tag: minecraft:is_player_attack for attacks performed by the player
New Entity Type Tags:
- immune_to_oozing For entities that cannot receive the Oozing mob effect
- immune_to_infested For entities that cannot receive the Infested mob effect
Added raider sub entity predicate

Block entities

Non-default components on item stacks containing block items are now stored on block entities when placed

Component removals from defaults are currently not preserved
Placing and breaking non-block entity blocks remains unchanged - nothing is preserved
Does not automatically cause preserved components to be restored on drops - this requires addition of copy_components function to loot table
Components are stored in field called components
- Some components (like custom_name) are still handled by legacy serialization, which means they might not be present in there
- Contains map of component id to component value

New Item Stack Components

`minecraft:item_name`

When present, replaces default item name with contained chat component
Differences from custom_name:
- item_name can't be changed or removed in anvil
- item_name is not styled with italics when displayed to player
- item_name does not show labels where applicable (for example: banner markers, names in item frames)

`minecraft:ominous_bottle_amplifier`

Controls the amplifier amount for an Ominous Bottle's bad omen effect
Format: integer between 0 and 4
- e.g. ominous_bottle_amplifier=3

Loot Functions

`copy_components`

Removed field components and replaced it with:

include - optional list of data components to be copied from source
- if omitted, all components present are included
exclude - optional list of data components to be excluded from copying
- if omitted, defaults to empty
Only components that are included (explicitly or implicitly) but not excluded will be copied

`set_name`

Added optional field target to specify which name should be set

Values:
- custom_name - sets custom_name component (default)
- item_name - sets item_name component

Added `set_ominous_bottle_amplifier`

Sets the ominous_bottle_amplifier component on the target item according to a number provider.

conditions: list of conditions to filter this function
amplifier: a number provider used to generate the ominous_bottle_amplifier component

Entity sub-predicates

`raider`

New raider sub-predicate has been added to match raiders Fields:

has_raid - Match whether the raider is in an active raid
is_captain - Match whether the raider is a captain

Resource Pack Version 31

Added the following particle types:
- infested
- item_cobweb
- small_gust
- raid_omen
- trial_omen
- trial_spawner_detection_ominous
- ominous_spawning
Added the following sound events:
- block.cobweb.break
- block.cobweb.step
- block.cobweb.place
- block.cobweb.hit
- block.cobweb.fall
- block.trial_spawner.about_to_spawn_item
- block.trial_spawner.spawn_item
- block.trial_spawner.spawn_item_begin
- block.trial_spawner.charge_activate
- block.trial_spawner.ambient_charged
- item.ominous_bottle.dispose
- event.mob_effect.bad_omen
- event.mob_effect.trial_omen
- event.mob_effect.raid_omen
Added textures for the following blocks and items:
- Ominous Vault
- Ominous Trial Spawner
- Ominous Bottle
Updated textures for normal Vault block
Added the following mob effect icon textures:
- infested
- oozing
- weaving
- wind_charged
- raid_omen
- trial_omen
- bad_omen_121
Added new models for Ominous state of Vault block

Fixed bugs in 24w13a

MC-123804 Explorer map and Ominous banner names appear in item frames, draw in italics, and can be removed with an anvil
MC-148057 Ominous banners generated in outposts show the pattern list
MC-166361 GUI scale does not visually update when the option is changed using the keyboard and without the mouse
MC-178410 Banners don't support the HideFlags tag when placed down as blocks
MC-268578 Bogged mob sits wrong in boats
MC-268627 Slime spawns are incorrect
MC-268716 Magma Cubes spawn even if there's only 2 blocks in height
MC-268882 Same Enchantments in an item components crashes the game
MC-268893 Comparators require a block update to function properly, and droppers/observers receive false state changes
MC-269015 Wind charges can destroy end crystals
MC-269143 Attribute modifiers cannot exclusively target the "body" slot
MC-269342 The experimental features details menu is rendered incorrectly after resizing the game window
MC-269371 If the 'GUI Scale' option is on 'Auto', and if you try to scale it down using CTRL + mouse wheel, it shows as '-1'
MC-269387 Mace sounds use the neutral sound category
MC-269388 Mace falling damage increase is applied while using an elytra
MC-269427 Lingering potion particles are tinted black instead of the potion's color
MC-269628 Heavy cores delete water when placed into it
MC-269635 The game crashes when attempting to eat lily pads or frogspawn
MC-269643 Waterlogged heavy core does not update water flow correctly
MC-269649 Who Needs Rockets advancement is granted after launching yourself up 8 blocks instead of 7 blocks
MC-269656 Feeding parrots poison while holding mace grants Over-Overkill challenge
MC-269659 Parrots can now be fed carrots to kill them instead of cookies
MC-269670 Game crash when giving bundle with hide tooltip

Minecraft Snapshot 24w13a