Trial Chambers

It can generate in 55 biomes, almost everywhere. Only these biomes never have one:

• Deep Dark

Placement grid

34×34 chunks

Minimum gap

12×12 chunks

Average distance

every ~544 blocks

Each grid cell gets one attempt, placed at least the minimum gap from the cell edge; it only succeeds in a valid biome and spot.

Every chest, barrel and suspicious block, with the exact chance each item appears in one container.

Trial Chambers corridor chest 1–3 item stacks · 10 items

Item	Chance	Count	Average
Tuff	28.4%	8–60	4.42
Bamboo Hanging Sign	19.6%	1–12	0.53
Bamboo Planks	19.6%	3–18	0.95
Ender Pearl	19.6%	1–6	0.32
Scaffolding	19.6%	2–30	1.26
Stone Axedamaged	19.6%	1–3	0.21
Stone Pickaxedamaged	19.6%	1–3	0.21
Torch	19.6%	3–18	0.95
Honeycomb	10.2%	2–24	0.53
Iron Axedamagedenchanted	10.2%	1–3	0.11

Trial Chambers entrance chest 2–3 item stacks · 5 items

Item	Chance	Count	Average
Arrow	55.1%	5–30	5.21
Honeycomb	55.1%	2–24	3.47
Wooden Axe	55.1%	1–3	0.69
Stick	31%	2–15	1.22
Trial Key	6.79%	1–3	0.07

Trial Chambers intersection chest 1–3 item stacks · 8 items

Item	Chance	Count	Average
Amethyst Shard	39.7%	8–60	6.51
Cake	39.7%	1–12	1.16
Block of Iron	39.7%	1–6	0.7
Diamond	21.5%	1–6	0.35
Diamond Axedamaged	11.2%	1–3	0.12
Diamond Pickaxedamaged	11.2%	1–3	0.12
Block of Emerald	11.2%	1–9	0.23
Block of Diamond	2.31%	1–3	0.02

Trial Chambers intersection barrel 1–3 item stacks · 9 items

Item	Chance	Count	Average
Baked Potato	49.3%	6–30	4.85
Bamboo Planks	49.3%	5–45	6.06
Golden Axedamaged	22.3%	1–3	0.24
Golden Pickaxedamaged	22.3%	1–3	0.24
Bucket	5.94%	1–6	0.09
Compassdamaged	5.94%	1–3	0.06
Diamond	5.94%	1–9	0.12
Diamond Axedamagedenchanted	5.94%	1–3	0.06
Diamond Pickaxedamaged	5.94%	1–3	0.06

Trial Chambers vault 3–5 item stacks · 22 items

Item	Chance	Count	Average
Emerald	38.4%	2–12	1.37
Arrow	31%	2–24	1.76
Tipped ArrowPoison	31%	2–24	1.76
Wind Charge	31%	1–36	1.23
Honey Bottle	24%	1–6	0.4
Iron Ingot	24%	1–12	0.66
Ominous Bottlerandom level	16.5%	1–3	0.18
Enchanted Bookenchanted	13.9%	1	0.14
Bowenchanted	10.4%	1	0.1
Shielddamaged	10.4%	1	0.1
Diamond	8.53%	1–6	0.13
Golden Apple	8.33%	1	0.08
Crossbowenchanted	6.96%	1	0.07
Golden Carrot	6.96%	1–2	0.1
Iron Axeenchanted	6.96%	1	0.07
Iron Chestplateenchanted	6.96%	1	0.07
Bolt Armor Trim (Smithing Template)	6.25%	1	0.06
Guster Banner Pattern	4.17%	1	0.04
Music Disc (Aaron Cherof - Precipice)	4.17%	1	0.04
Diamond Axeenchanted	3.48%	1	0.03
Diamond Chestplateenchanted	3.48%	1	0.03
Trident	2.08%	1	0.02

Trial Chambers ominous vault 3–5 item stacks · 18 items

Item	Chance	Count	Average
Emerald	56.2%	4–30	5.13
Wind Charge	47.4%	8–36	5.87
Tipped ArrowStrong Slowness	37.5%	4–36	3.52
Diamond	26.4%	2–9	0.73
Enchanted Golden Apple	22.5%	1	0.23
Flow Armor Trim (Smithing Template)	22.5%	1	0.23
Enchanted Bookenchanted	16.6%	1	0.17
Flow Banner Pattern	15%	1	0.15
Ominous Bottlerandom level	13.9%	1–3	0.15
Block of Emerald	13.8%	1	0.14
Crossbowenchanted	11%	1	0.11
Block of Iron	11%	1	0.11
Diamond Axeenchanted	8.28%	1	0.08
Diamond Chestplateenchanted	8.28%	1	0.08
Golden Apple	8.28%	1	0.08
Heavy Core	7.5%	1	0.08
Music Disc (Lena Raine - Creator)	7.5%	1	0.08
Block of Diamond	2.76%	1	0.03

Trial Chambers supply chest 3–5 item stacks · 14 items

Item	Chance	Count	Average
Arrow	37.3%	4–70	4
Baked Potato	37.3%	2–20	1.33
Glow Berries	37.3%	2–50	2.67
Stone Pickaxedamaged	37.3%	1–5	0.44
Acacia Planks	20.4%	3–30	1
Bone Meal	20.4%	2–25	0.78
Milk Bucket	20.4%	1–5	0.22
Moss Block	20.4%	2–25	0.78
PotionRegeneration	20.4%	2–10	0.44
PotionStrength	20.4%	2–10	0.44
Tipped ArrowPoison	20.4%	4–40	1.33
Tipped ArrowSlowness	20.4%	4–40	1.33
Torch	20.4%	3–30	1
Tuff	20.4%	5–50	1.67

Chances are per container. Enchanted items get a random enchantment when the chest is first opened.

Mobs in the Trial Chambers

Trial spawner mobs

Its trial spawners pick from 10 mobs; ominous spawners send stronger waves.

• Breeze
• Husk
• Spider
• Zombie
• Bogged
• Skeleton
• Stray
• Cave Spider
• Silverfish
• Slime

Normal monsters don't spawn inside it; only its own spawners do.

Find it with a command

With cheats on, this prints the coordinates of the nearest one:

Data: Minecraft Java Edition 26.3 game files. How we source this