Ominous Trial

An ominous trial is an ominous event in which trial chambers become more challenging.^[1]

Behavior

Initiation

When a player with Bad Omen is seen by a (non-ominous) trial spawner, the player's Bad Omen is replaced with Trial Omen. The duration of the Trial Omen is always 15 minutes multiplied by the level of Bad Omen, regardless of the remaining duration on the Bad Omen effect. If the player already has the Trial Omen effect, with T minutes remaining, and also has Bad Omen level X (with any amount of time remaining), and is seen by a trial spawner, the player will lose the Bad Omen effect (regardless of the values of T and X), and the time remaining on the Trial Omen will be set to max(T, 15*X). If T > 15*X, then the Bad Omen is effectively wasted. Notice that the player cannot stack lower levels of Bad Omen to increase the time remaining.

When a trial spawner sees a player with Trial Omen or Bad Omen, it becomes ominous.

Time and place

The ominous trial is controlled by the ominous trial spawners. The challenge is provided by the mobs and projectiles spawned by the spawners (more info in § Challenge). Therefore, the ominous trial is located where the ominous trial spawners are, and the duration of the trial is the duration of time that the spawners are both active and ominous. Non-ominous trial spawners also become part of the trial if a player with Bad Omen or Trial Omen is nearby, since the spawners become active and ominous when they see the player.

In summary, an ominous trial

Lasts as long as either:
- There are active ominous trial spawners in the location.
- There is a player with Trial Omen and there are trial spawners in the location.
Takes place in:
- Any location where there are active ominous trial spawners nearby.

Spawner conversion

When an active trial spawner becomes ominous, it despawns its current mobs and resets its total mobs spawned counter. The inactive trial spawner becomes ominous, is skipped if it was not previously ominous before going on cooldown, then becomes ominous.

The Trial Omen effect is not removed upon a trial spawner becoming ominous. Therefore, the ominous trial lasts until the effect runs out or is cleared.

Challenge

An ominous trial spawner randomly spawns projectiles in the air around it, and usually spawns more powerful mobs too.

The mobs usually have helmets and/or chestplates if they can wear it (zombies and skeletons are usually armored). This armor always has a bolt or flow armor trim using copper as the trim material. The armor is also more likely to be enchanted. Even if the player is on Easy difficulty, mobs could still spawn with armor.
Ominous Trial Spawners with mobs that are unable to wear equipment spawn double the total mob count over the course of the challenge. These spawners also spawn an additional mob out at once during its challenge.
The projectiles and lingering potions spawn above players and mobs.

Rewards

Like its non-ominous variant, an ominous trial spawner ejects loot when it has spawned the total amount of mobs it is able to spawn during a period of activity, and all of those mobs are all defeated. The ominous trial spawner uses a different loot table and gives much better loot than a non-ominous trial spawner would. The ominous trial spawner's loot table includes items such as ominous trial keys. This is currently the only method of obtaining ominous trial keys.

The ominous trial keys can then be used at any time to open ominous vaults. Each ominous vault can only be opened 1 time by each player. A player can open an ominous vault by using an ominous trial key on it.

In Java Edition and Bedrock Edition, each trial chambers ominous vault contains items drawn from 3 pools, with the following distribution:

Item	Stack Size ^[A]			Weight ^[B]			Chance ^[C]	Avg. per container ^[D]	Avg. # containers to loot ^[E]
Item	1×	1–3×	1×	1×	1–3×	1×	Chance ^[C]	Avg. per container ^[D]	Avg. # containers to loot ^[E]
Emerald	4–10	4–10	—	¹⁴⁵⁄₂₁₇₅	⁵⁄₁₅	—	56.2%	5.133	1.8
Wind Charge	8–12	8–12	—	¹¹⁶⁄₂₁₇₅	⁴⁄₁₅	—	47.4%	5.867	2.1
Arrow of Slowness IV	4–12	4–12	—	⁸⁷⁄₂₁₇₅	³⁄₁₅	—	37.5%	3.520	2.7
Diamond	2–3	2–3	—	⁵⁸⁄₂₁₇₅	²⁄₁₅	—	26.4%	0.733	3.8
Nothing^[F]	—	—	1	—	—	¹⁰⁄₄₀	25.0%	0.250	4.0
Flow Armor Trim Smithing Template	—	—	1	—	—	⁹⁄₄₀	22.5%	0.225	4.4
Enchanted Golden Apple	—	—	1	—	—	⁹⁄₄₀	22.5%	0.225	4.4
Flow Banner Pattern	—	—	1	—	—	⁶⁄₄₀	15.0%	0.150	6.7
Ominous Bottle III - V^[G]	1	1	—	²⁹⁄₂₁₇₅	¹⁄₁₅	—	13.9%	0.147	7.2
Block of Emerald	1	—	—	³⁰⁰⁄₂₁₇₅	—	—	13.8%	0.138	7.2
Enchanted Crossbow^[H]	1	—	—	²⁴⁰⁄₂₁₇₅	—	—	11.0%	0.110	9.1
Block of Iron	1	—	—	²⁴⁰⁄₂₁₇₅	—	—	11.0%	0.110	9.1
Golden Apple	1	—	—	¹⁸⁰⁄₂₁₇₅	—	—	8.3%	0.083	12.1
Enchanted Diamond Axe^[I]	1	—	—	¹⁸⁰⁄₂₁₇₅	—	—	8.3%	0.083	12.1
Enchanted Diamond Chestplate^[I]	1	—	—	¹⁸⁰⁄₂₁₇₅	—	—	8.3%	0.083	12.1
Music Disc (Creator)	—	—	1	—	—	³⁄₄₀	7.5%	0.075	13.3
Heavy Core	—	—	1	—	—	³⁄₄₀	7.5%	0.075	13.3
Enchanted Book^[J]	1	—	—	¹²⁰⁄₂₁₇₅	—	—	5.5%	0.055	18.1
Enchanted Book^[K]	1	—	—	¹²⁰⁄₂₁₇₅	—	—	5.5%	0.055	18.1
Enchanted Book^[L]	1	—	—	¹²⁰⁄₂₁₇₅	—	—	5.5%	0.055	18.1
Block of Diamond	1	—	—	⁶⁰⁄₂₁₇₅	—	—	2.8%	0.028	36.2

↑ The size of stacks (or for unstackable items, number) of this item on any given roll.
↑ The weight of this item relative to other items in the pool.
↑ The odds of finding any of this item in a single chest.
↑ The number of items expected per chest, averaged over a large number of chests.
↑ The average number of chests the player should expect to search to find any of this item.
↑ 'Nothing' does not refer to the chance of an empty chest. Instead, it refers to the chance that the random loot generator does not add any loot on a single roll.
↑ Ominous bottle level between III and V
↑ Enchantment probabilities are the same as a level-5 to level-20 enchantment would be on an enchantment table that was able to apply treasure enchantments (except Soul Speed, Swift Sneak, and Wind Burst), and where the chance of multiple enchantments is not reduced.
↑ ^a ^b Enchantment probabilities are the same as a level-10 to level-20 enchantment would be on an enchantment table that was able to apply treasure enchantments (except Soul Speed, Swift Sneak, and Wind Burst), and where the chance of multiple enchantments is not reduced.
↑ Enchanted with a random level of Breach, or Density.
↑ Enchanted with a random level of Knockback, Punch, Smite, Looting, or Multishot.
↑ Enchanted with level I of Wind Burst.

Advancements

Advancement	In-game description	Actual requirements (if different)
How Did We Get Here?	Have every effect applied at the same time	Have all of these 33 status effects applied to the player at the same time: Absorption Bad Omen Blindness Conduit Power Darkness Dolphin's Grace Fire Resistance Glowing Haste Hero of the Village Hunger Infested Invisibility Jump Boost Levitation Mining Fatigue Nausea Night Vision Oozing Poison Raid Omen Regeneration Resistance Slow Falling Slowness Speed Strength Trial Omen Water Breathing Weakness Weaving Wind Charged Wither The source of the effects is irrelevant for the purposes of this advancement. Other status effects may be applied to the player, but are ignored for this advancement. See also: Tutorial:Advancement guide/Nether tab § How Did We Get Here? This is a hidden advancement, meaning that it can be viewed by the player only after completing it, regardless of if its child advancement(s), if any, have been completed.
Over-Overkill	Deal 50 hearts of damage in a single hit using the Mace	Damage can be dealt to any mob, even those that do not have 50 hearts of health overall.
Revaulting	Use an Ominous Trial Key on an Ominous Vault	—

History

Java Edition
1.20.5 Experiment Update 1.21	24w13a	Added ominous trials.
1.21	24w18a	Ominous trials are now available without using the "Update 1.21" experimental data pack.
Bedrock Edition
1.21.0 Experiment Update 1.21	Preview 1.21.0.20	Added ominous trials.
1.21.0	Preview 1.21.0.22	Ominous trials are now available without using the "Update 1.21" experimental toggle.

Issues

Issues relating to "Ominous Trial" are maintained on the bug tracker. Issues should be reported and viewed there.

Gallery

Mojang screenshots

Several strays spawning during an ominous trial
Makena fighting several bogged during an ominous trial
Noor fighting in the Trial Chambers with the Trial Omen effect.

References

↑ "Introducing the mace and ominous events" by Cristina Anderca – Minecraft.net, March 27, 2024.

Navigation

[stacksize-2] The size of stacks (or for unstackable items, number) of this item on any given roll.

[weight-3] The weight of this item relative to other items in the pool.

[chance-4] The odds of finding any of this item in a single chest.

[items-5] The number of items expected per chest, averaged over a large number of chests.

[chests-6] The average number of chests the player should expect to search to find any of this item.

[nothing-7] 'Nothing' does not refer to the chance of an empty chest. Instead, it refers to the chance that the random loot generator does not add any loot on a single roll.

[ominous-bottle-2-4-8] Ominous bottle level between III and V

[enchant-with-levels-5-20-9] Enchantment probabilities are the same as a level-5 to level-20 enchantment would be on an enchantment table that was able to apply treasure enchantments (except Soul Speed, Swift Sneak, and Wind Burst), and where the chance of multiple enchantments is not reduced.

[enchant-with-levels-10-20-10] Enchantment probabilities are the same as a level-10 to level-20 enchantment would be on an enchantment table that was able to apply treasure enchantments (except Soul Speed, Swift Sneak, and Wind Burst), and where the chance of multiple enchantments is not reduced.

[enchant-randomly-breach-density-11] Enchanted with a random level of Breach, or Density.

[enchant-randomly-trial-chambers-2-12] Enchanted with a random level of Knockback, Punch, Smite, Looting, or Multishot.

[enchant-randomly-wind-burst-13] Enchanted with level I of Wind Burst.

[1] "Introducing the mace and ominous events" by Cristina Anderca – Minecraft.net, March 27, 2024.

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