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Minecraft Copper Dungeon / Trial Chambers Guide(Find Easily)

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In this guide, we’ll take a comprehensive look at the Trial Chambers, also known as the Copper Dungeon, one of the dungeon-type structures found in Minecraft.

 

Contents

  1. How to Find / Basic Information
  2. Trial Spawner / Vault Rewards
    1. Trial Spawner / Trial Keys
    2. Hostile Mobs
    3. Vault Rewards
  3. Other Loot
    1. Entrance Chests
    2. Branching Corridor Chests
    3. Supply Chests
    4. Barrels
    5. Pottery
    6. Dispensers

 

  How to Find / Basic Information

The Copper Dungeon, officially known as the Trial Chambers, generates primarily in the Deepslate layer, between Y=0 and Y=-64, making it a structure that is generally difficult to find naturally in Minecraft.

Multiple Copper Dungeons can exist within a single world. Inside, players can farm items through the core features of the structure, including Trial Spawners, Vaults, and various chests. These dungeons are also the main source of key items such as Wind Charges, Heavy Cores (used to craft the Mace), and Breeze Rods.

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The easiest way to find a Copper Dungeon is by using a Cartographer villager. After leveling a cartographer up to Level 3 (Journeyman), there is a 66% chance that you can purchase a map leading to a Copper Dungeon. Since each villager sells a map pointing to a different dungeon, it is possible to explore multiple Copper Dungeons.

You can also use the command below to locate the nearest Copper Dungeon:

/locate structure minecraft:trial_chambers
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  Trial Spawner / Vault Rewards

To open the Vaults, which are the main objective of the Copper Dungeon, you need either a Trial Key or an Ominous Trial Key. To obtain these keys, you must first complete Trial Spawner encounters and earn rewards from them. Because of the presence of Trial Spawners, hostile mobs do not naturally spawn inside Copper Dungeons.

 

Trial Spawner / Trial Keys

Trial Spawners are special mob spawners placed in reward rooms or corridors within the Copper Dungeon. When a player enters within 4 blocks, the spawner activates, and a wave-based trial begins. The number of monsters increases based on how many players are nearby, and the quality of the rewards improves accordingly. Once all spawned mobs are defeated, the trial is considered completed.

After completion, the Trial Spawner has a 30-minute cooldown, and the player who initiated the trial must remain logged in for the full 30 minutes for the cooldown to finish.

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When a Trial Spawner is cleared, it has a 50% chance to reward players with a normal Trial Key along with other loot. However, if a player enters within 14 blocks while affected by the Bad Omen status effect, the Trial Spawner will transform into an Ominous Trial Spawner, significantly increasing both the difficulty and the quality of rewards. If you want to craft a Mace, you must clear an Ominous Trial Spawner and use the resulting Ominous Trial Key to open an Ominous Vault.

Additionally, Ominous Trials feature a special mechanic. While the spawned mobs are alive, each Trial Spawner periodically drops two lingering potions and arrows downward. Lingering potions have an 8-second cooldown, and arrows have a 6-second cooldown

  • Normal Trial Spawner Rewards – Trial Key, Emeralds, Baked Potatoes, Glow Berries, Golden Carrots, Ender Pearls, Potion of Regeneration, Potion of Strength
  • Ominous Trial Spawner Rewards – Ominous Trial Key, Steak, Baked Potatoes, Golden Carrots, Rotten Flesh, Potion of Regeneration, Potion of Strength
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Hostile Mobs

There are a total of 11 different mob types, and each Trial Spawner is assigned a specific set of mobs that it spawns.

  • Breeze – A total of 2 spawns, with an additional 0.5 per player.
  • Zombie – A total of 6 spawns, with +2 per player.
    In Ominous Trials, there is a 50% chance for Zombies to wear Chain, Iron, or Diamond armor enchanted with Protection IV, Fire Protection IV, and Projectile Protection IV, and wield an Iron Sword.
    There is also a 14% chance for them to wield a Diamond Sword or an enchanted sword.
  • Husk – A total of 6 spawns, with +2 per player.
    In Ominous Trials, there is a 50% chance for Husks to wear Chain, Iron, or Diamond armor enchanted with Protection IV, Fire Protection IV, and Projectile Protection IV, and wield an Iron Sword.
    There is also a 14% chance for them to wield a Diamond Sword or an enchanted sword.
  • Spider – A total of 6 spawns, with +2 per player.
    In Ominous Trials, the spawn count is doubled.
  • Slime – A total of 6 spawns, with +2 per player.
    In Ominous Trials, the spawn count is doubled.
  • Silverfish – A total of 6 spawn, with +2 per player.
    In Ominous Trials, the spawn count is doubled.
  • Baby Zombie – A total of 6 spawns, with an additional 0.5 per player.
    In Ominous Trials, there is a 50% chance for Baby Zombies to wear Chain, Iron, or Diamond armor enchanted with Protection IV, Fire Protection IV, and Projectile Protection IV, and wield an Iron Sword.
    There is also a 14% chance for them to wield a Diamond Sword or an enchanted sword.
  • Cave Spider – A total of 6 spawns, with +2 per player.
    In Ominous Trials, the spawn count is doubled.
  • Stray – A total of 6 spawns, with +2 per player.
    In Ominous Trials, there is a 50% chance for Strays to wear Chain, Iron, or Diamond armor enchanted with Protection IV, Fire Protection IV, and Projectile Protection IV, and a 25% chance to wield a bow enchanted with Power or Punch.
  • Skeleton – A total of 6 spawns, with +2 per player.
    In Ominous Trials, there is a 50% chance for Skeletons to wear Chain, Iron, or Diamond armor enchanted with Protection IV, Fire Protection IV, and Projectile Protection IV, and a 25% chance to wield a bow enchanted with Power or Punch.
  • Bogged – A total of 6 spawns, with +2 per player.
    In Ominous Trials, there is a 50% chance for Bogged to wear Chain, Iron, or Diamond armor enchanted with Protection IV, Fire Protection IV, and Projectile Protection IV, and a 25% chance to wield a bow enchanted with Power or Punch.
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Breeze
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Zombie
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Husk
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Spider
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Slime
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Silverfish
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Baby Zombie
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Cave Spider
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Stray
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Skeleton
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Bogged

 

Vault Rewards

There are two types of vaults: Normal Vaults and Ominous Vaults. When approached, a vault opens its mouth and emits a colored glow, allowing players to distinguish between them. The surrounding blocks can also identify them. Normal Vaults are surrounded by carved copper blocks on the floor and nearby structures. The presence of oxidized copper grates around them can identify ominous Vaults. Each vault must be opened using its corresponding key to receive rewards.

A vault can only be opened once per player. However, in theory, if 129 different players open the same vault, the first player would be able to receive rewards from it again.

  • Normal Vault Rewards – Arrows, Poison Arrows, Emeralds, Wind Charges, Iron Ingots, Honey Bottles, Ominous Bottles (1–2), Diamonds / Emeralds, Shields, Enchanted Bows, Enchanted Crossbows, Enchanted Iron Axes, Enchanted Iron Armor, Golden Carrots, Enchanted Books(Sharpness, Bane of Arthropods, Efficiency, Fortune, Silk Touch, Feather Falling, Riptide, Loyalty, Impaling, Channeling, Mending), Enchanted Diamond Axes, Enchanted Diamond Armor, Golden Apples, Smithing Template (Bolt Armor Trim), Banner Pattern (Whirl), Music Disc (Precipice – Aaron Cherof), Trident
  • Ominous Vault Rewards – Emeralds, Wind Charges, Slowness II Arrows, Diamonds, Ominous Bottles (3–5), Emerald Blocks, Iron Blocks, Enchanted Crossbows, Golden Apples, Enchanted Diamond Axes, Enchanted Diamond Armor, Enchanted Books(Knockback, Punch, Smite, Looting, Multishot, Breach, Density, Wind Burst), Diamond Blocks, Enchanted Golden Apples, Smithing Template (Flow Armor Trim), Banner Pattern (Flow Pattern), Music Disc (Creator – Lena Raine), Heavy Core
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  Other Loot

In addition to vaults, there are many other sources of loot, including barrels, pottery, and supply chests, making the Copper Dungeon rich in farming opportunities.

 

Entrance Chests

Entrance chests are usually found in small rooms along the corridor when first entering the dungeon.

  • Arrows, Honeycomb, Wooden Axes, Sticks, Trial Keys
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Branching Corridor Chests

These chests are usually found at the ends of branching corridors, rather than in the center where paths split.

  • Amethyst Shards, Cake, Iron Blocks, Diamonds, Emerald Blocks, Diamond Axes, Diamond Pickaxes, Diamond Blocks
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Supply Chests

  • Arrows, Glow Berries, Baked Potatoes, Stone Pickaxes, Tuff, Poison Arrows, Slowness Arrows, Acacia Planks,  Torches, Bone Meal, Moss Blocks, Potion of Regeneration, Potion of Strength, Milk Buckets

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Barrels

  • Bamboo Planks, Baked Potatoes, Golden Axes, Golden Pickaxes, Diamonds, Buckets, Compasses, Diamond Axes, Diamond Pickaxes

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Pottery

By breaking pottery scattered throughout the dungeon, you can obtain random loot.

  • Emeralds, Arrows, Iron Ingots, Trial Keys, Diamonds, Emerald Blocks, Music Disc (Creator – Lena Raine), Diamond Blocks

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Dispensers

  • Fire Charges, Snowballs, Arrows, Water Buckets, Eggs, Lingering Potion of Healing, Lingering Potion of Poison, Lingering Potion of Slowness, Lingering Potion of Weakness, Splash Potion of Poison, Splash Potion of Slowness, Splash Potion of Weakness

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If you’d like to learn more about Minecraft, please check out the links below.

Guide to the Minecraft CopperGolem(How to Craft, EasterEggs)