We're happy to share another snapshot, this time offering an early look at some exciting new adventures waiting for you underground in the form of Trial Chambers!

Trial Chambers are designed to be challenging moments of combat and exploration hidden medium-deep below the surface of the Overworld. Trial Chambers bring new decorative and lighting blocks, new Trial Spawners to deliver a different style of multi-mob fights, and the bushy-browed Breeze, a new mob specific to Trial Chambers which will add quite a bit of chaos to your combats.

Happy Mining!

Changes

Monster Spawner now renders their inner faces when looking inside

Technical Changes

The Data Pack version is now 24
The Resource Pack version is now 21

Data Pack Version 24

Added experimental Breeze mob
Added experimental Trial Spawner block
Increased maximum value of Jigsaw structure variable size from 7 to 20
Added trial_chambers_copper_bulb_degradation structure processor list

Resource Pack Version 21

uniform font has been updated to use Unifont 15.1.04 (from 15.0.06)
The only supported texture format is now .png

Breeze Mob

Added entity models and textures for experimental Breeze mob:
- breeze, wind_charge
Added shader:
- breeze_wind

Experimental Features

Added Breeze mob

The Breeze is a cunning, hostile mob that can spawn via Trial Spawner in some rooms within the Trial Chambers
The Breeze moves primarily by leaping around the target, sometimes jumping quite long distances
An aggressive adversary, the Breeze shoots volatile wind energy in the form of wind charge projectiles at its target
Wind charges deal a small amount of damage when colliding directly with an entity
After colliding with an entity or a block, wind charge projectiles produce a wind burst, which knocks back entities in the area by several blocks
Wind bursts also have the effect of 'activating' certain blocks:
- Non-Iron Doors and Trapdoors are flipped
- Fence Gates are flipped
- Buttons are pressed
- Levers are flipped
- Bells are rung and swung
- Lit Candles (both standalone and on cake) are extinguished
Wind bursts do not have any effect on Iron Doors, Iron Trapdoors, or any block being held in its position by a Redstone signal

Trial Spawner

Trial Spawner is a new variant of Monster Spawners that ejects rewards upon completion and can have variable levels of challenge in multiplayer
The challenge level will increase for each new player a Trial Spawner notices nearby
- Challenge level will not decrease until it is reset during a Trial Spawner's cooldown
Unlike normal spawners, a Trial Spawner will spawn a limited number of mobs proportional to its current challenge level
- It can only spawn a mob at positions that are within line of sight
- It can spawn a mob regardless of any light level requirement the mob has
- Spawned mobs are persistent
Once all mobs are defeated, the Trial Spawner will eject a set of rewards proportional to the current challenge level
- After the rewards have been ejected, the Trial Spawner goes into cooldown for 30 minutes during which it will no longer spawn mobs
Trial Spawners cannot be crafted nor obtained by players in Survival - instead, they can be found naturally placed throughout Trial Chambers
Trial Spawners are extremely slow to mine and resistant to explosions, and will not drop even with Silk Touch
When placed in Creative, Trial Spawners have no mob type set by default
- The mob type can be set by interacting with it while holding a Spawn Egg
Creative and Spectator players cannot be detected or noticed by Trial Spawners

Trial Chambers

Trial Chambers are a new structure in the Overworld where players can explore and take on combat challenges during the mid-game
- Trial Chambers are made out of a variety of Copper and Tuff blocks and can be found in different sizes from large to small
- Trial Chambers are a relatively common find throughout the Deepslate layer of the underground
The layout of each Trial Chamber is procedurally generated, and can include traps, reward chests and a variety of combat spaces
- Supply chests can be found between different rooms, and give you blocks and items which help you navigate your trials
- Reward chests are guarded by challenges in each room, and can be a source of many high level enchanted books and equipment
- The loot found in reward chests are still being iterated, and are absolutely not final
Each Trial Chamber will include Trial Spawners with a melee, small melee, or ranged category:
- Melee
  - Zombie
  - Husk
  - Slime
- Small Melee
  - Spider
  - Cave Spider
  - Baby Zombie
  - Silverfish
- Ranged
  - Skeleton
  - Stray
  - Skeleton with Poison Tipped Arrows
Each Trial Spawner category will only use one mob for the entire structure when generated, and these mobs are randomized for each Trial Chamber
- For example, one Trial Chamber might only spawn Zombies, Cave Spiders and Strays, while another might only spawn Slimes, Silverfish and Skeletons
- The exceptions to this are some Trial Spawners in unique rooms which always spawn Breezes

Known issues

The corridors sometimes end with a dead end
Aquifers, Lush Caves, and Sculk Veins sometimes intersect with the Trial Chamber

Trial Key

An item that can only be obtained from Trial Spawners
Trial Keys do not currently have any functionality

Fixed bugs in Snapshot 23w45a

MC-131646 Drowned spawners only work in biomes where drowned spawn
MC-177446 "RootVehicle" tag in playerdata entry is not upgraded
MC-186797 Functioning clock and compasses in crafting output slot
MC-255244 NBT link/reference when using /fill
MC-265702 Text components in commands accept malformed JSON
MC-265747 Punching a TNT Minecart in creative mode drops the minecart
MC-265875 Compasses, Clocks and Recovery Compasses work normally within the output slot of the crafter
MC-266054 Side Water texture on Copper bulbs
MC-266056 Mobs suffocate inside most copper grate block variants
MC-266063 Copper Doors and Trapdoors make generic metal sounds when placing
MC-266090 Light can pass through copper bulbs
MC-266091 Copper Bulbs do not cull faces correctly
MC-266096 Mobs can spawn on oxidized or waxed copper grates
MC-266248 No error message when granting/revoking an advancement that is already granted/revoked
MC-266256 Accessibility button in the Welcome screen still needs its own string
MC-266287 Can't load .dat and .nbt files (server list & saved hotbar)
MC-266289 Could not save data raids.dat and random_sequences.dat

Minecraft Snapshot 23w45a