Corridors 

• Pots, vaults and doors to chambers line the walls
• Arrow and fire charge dispensers that can be shot at spawners
• Only part of the structure where the amount of spawners are random
• Dripstone can generate on the bottom to punish falling from the higher levels
• Spawners can have zombie variants, skeleton variants, spiders, slimes and pillagers

Ledge (originally called chamber 1)

• Similar ledge layout but platforms are lower
• Normal spawners: skeleton variants
• Tough spawner: jockeys

Chasm (originally called chamber 2)

• Original was just ledge but with powder snow, this is a new layout with a powder snow pit on the bottom
• Holes and trapdoors to drop down mobs
• NS: zombie variants, spiders, zoglins
• TS: big slimes

Cubic (originally called chamber 4)

• Basic layout like original but randomly generated
• NS: zombie variants, zoglins, slimes
• TS: wither skeletons

Crawl (originally called chamber 8)

• Mostly unchanged from original but added wind charge launchers to get to the next floor for fun
• NS: skeleton variants
• TS: ranged wither skeletons

Eruption

• Press every button on all 4 sides of the room to make lava pour from the center in a guided path
• NS: vindicators, slimes, pillagers
• TS: breezes

Pedestal

• Try to cross the gap to the spawners with trapdoors and unique extending platforms
• NS: slimes, pillagers, phantoms
• TS: witches (remember: honey bottles cure poison)

Assembly

• Fight a breeze on the bottom, climb up the parkour section at the back, then fight ranged mobs on the hanging platforms at the top
• Bottom section has traps for breezes to trigger such as potion dispensers, trapdoor pits, and deadly rocket dispensers
• Throw wind charge on the hanging platforms to expand their size
• NS: zombie variants (bottom), skeleton variants, pillagers (top)
• TS: breezes

Slanted

• Chamber is split into mini chambers in each corner designed for fighting a specific mob type
• More of a maze-like layout between enemy rooms
• NS: skeleton variants, spiders, phantoms, vindicators, drowned, creepers
• TS: vexes

Ladder (new!)

• Climb up the ladder of platforms, each with a spawner, along with blazes shooting at you from the top
• Create staircases with the chiseled copper mechanic
• Knock mobs down the middle to land on dripstone
• NS: spiders, zoglins, pillagers, slimes
• TS: blazes

Channel (new!)

• Water themed chamber
• Soul sand shoots mobs above water incase you try to escape
• NS: drowned, trident drowned
• TS: guardians

Crash (new!)

• Explosive themed chamber about destroying the terrain you fight on
• Chamber is trapped to punish reckless explosions
• Ghasts shoot you while kept in place
• NS: creepers, zombies
• TS: ghasts

Cargo (new!)

• Mobs and the player can ride along constantly shifting rails
• Activate the secret to ride to the top rails and fight the tough spawner
• NS: skeleton variants, pillagers, spiders, phantoms
• TS: rocket pillagers

Streak (new!) (1.21.4+)

• Use speed potions and soul speed to avoid fast melee skeletons
• Avoid tripwires that open the tough spawner's cage
• NS: melee skeletons, husks
• TS: creakings

Base vaults are split into three: armor, valuables, and weapons. This will let you (partially) customize your loot and opt out of stuff you don't want. All 3 vault types will always be found grouped together. The structure will generate plenty of these incase a player wants to use all of their keys on only one category. Luck adds a 33% chance to dispense double the loot. Aesthetic based loot (sherds, banner patterns, trims) are moved to hidden chests in intersections so that they don't get in the way of the more useful vault loot.

Armor table

Valuables table

Weapons table

Ominous vaults are still a single category. You will get both types of keys from ominous spawners so the ominous vaults will act as an enhancement to the loot the other vaults give you. 

Ominous table

Pots can hold wind charges or less valuable ores, such as lapis, coal and redstone. You'd likely find this structure while mining, so this is meant to synergize with that. 

Tridents and heavy cores are reserved for bosses. Once defeated, the main boss spawner will dispense a trident on normal difficulty or a heavy core on ominous. This gives you a 100% chance of getting these items per trial chamber (unlike the very low chances per vault from vanilla) in exchange of the added difficulty from the bosses.

Food will be ejected by tough spawners instead of them filling up vault loot tables. 

This is something I particularly want to balance well, so feedback would be appreciated!

Trial chambers contain 4 exclusive enchantments to act as another incentive for grinding vaults. All are single level, situationally powerful, and changes the behavior of the weapon sort of in the same vein as channeling or silk touch. Ominous vaults have a 25% chance of ejecting a book containing one of these but only if the player has the luck effect.

Daredevil: Creates an explosion on the opponent if hit with a mace's smash attack and deals massive damage, but also damages you depending on how close you are.

Storm Front: Causes a wind charge explosion wherever a trident is thrown. Acts as a renewable wind charge. Incompatible with riptide.

Equity: Axes mimic Flame II and Knockback II (along with a small damage increase) when attacking an entity holding a sword.

Razor Tip (1.21.11+): Spears deal 2x damage if a hit is landed right at the tip of your attack range. The bonus damage range increases if the player's attack reach also increases (including creative mode). 

There are 5 different boss chambers at the end of every trial chambers, each with unique mechanics and difficult mobs. I want most of these to stay a surprise so there won't be much detail here. Defeating a boss on normal difficulty will reward each player a trident. Ominous difficulty will reward a heavy core instead. While you always can run straight to the boss to get a trident/heavy core if you really wanted to, you'll be missing out on all the other loot the structure has.

Unlike normal chambers, you typically only need to complete the main boss spawner. Usually the other spawners are supporting the boss and sometimes spawn mobs forever.

Q: Why am I getting normal trial keys when I have trial omen?
A: This is intended. All ominous spawners have a 1/4 chance of ejecting an ominous trial key. Normal and ominous vaults are meant to be used together.

Q; What am I supposed to do in the secret chambers?
A: Figuring out what your goal is meant to be part of the puzzle, but here's some tips:

• The keys found in secret chambers can only be used on the vaults found within the same room.
• A sign with a number next to a vault means you need that many keys to open it.
• The main mechanic of the chamber is typically revealed in front of you as you enter the room.

Q: Where do I find trial chambers exclusive disks, armor trims and sherds?
A: All of these are no longer in any of the vaults' loot tables. They can instead be found in secret barrels in intersections (the area between the two main corridors).

Q: Does this replace vanilla trial chambers?
A: Yes, the structure minecraft:trial_chambers is completely overridden by this. The vertical trial chambers are in their own namespace notenoughtrials:vertical_trial_chambers

Q: How do I get the new enchantments?
A: Ominous vaults have a 25% chance of ejecting a book containing one of these enchantments if you have the luck effect.

Q: Why are vertical trial chambers not generating at all or extremely rarely in my world with modded biomes?
Vertical trial chambers begin generating underground, so it checks if it is in the correct biomes (hills/mountains) at that position. If a cave biome generates over that space, the structure cannot confirm it is under a highland biome so it cannot generate. Biome mods and datapacks may add several cave biomes that heavily reduces the chances of the structure generating for this reason. If you are having this issue I would recommend using /place structure notenoughtrials:vertical_trial_chambers ~ ~ ~ over any highland area you prefer. This issue is known to happen with Terralith.

Not Enough Trials has integrations with several mods! The following is available for ONLY 1.21.1 Neoforge

Not Enough Trials Mod Integrations