Ominous Trial Spawner

An ominous trial spawner is a trial spawner that has been altered by a Trial Omen effect carried by a player as part of an ominous trial. It spawns more dangerous mob waves, as well as ominous item spawners, but ejects better rewards and is the only source of ominous trial keys.

No tool can accelerate the breaking process of an ominous trial spawner.

Ominous trial spawners drop nothing when destroyed.

Trial spawners convert to ominous trial spawners if a player with the Trial Omen effect enters the 14 block detection area and is in the line of sight of the trial spawner. This also happens when the player has the Bad Omen effect, which gets converted into Trial Omen. When a trial spawner becomes ominous, all of its existing mobs are despawned. If the spawner was on cooldown and was not ominous before going on cooldown, the cooldown is skipped when becoming ominous. The ominous trial spawner then immediately becomes active. An inactive ominous trial spawner converts back into a regular trial spawner after cooling down for 30 minutes.

Ominous trial spawners cannot be obtained as items in Survival or Adventure mode. They are technically block state variants of normal trial spawners and can be obtained or created using commands, such as:

Java Edition:

• /give @s minecraft:trial_spawner[block_state={ominous:"true"}]
• /setblock x y z minecraft:trial_spawner[ominous=true]

Bedrock Edition:

• /setblock x y z trial_spawner ["ominous"=true]

An ominous trial spawner is similar to a normal trial spawner, but spawns more difficult mobs and ejects more powerful loot.

Ominous trial spawners converted from trial spawners that generate naturally in trial chambers spawn mobs with (better) weapons and wearing armor. Ominous trial spawners with mobs that are unable to wear equipment, such as spiders or silverfish, spawn double the total mob count over the course of the challenge. These spawners also allow an additional mob to be out all at once during their challenge.

Each armor set consists of only a chestplate and helmet with each piece having a 50% chance of being missing. All armor is enchanted with Fire Protection IV, Projectile Protection IV, and^[verify] Protection IV. In Java Edition^[1], mobs don't drop the armor on death or upon conversion to a drowned In Java Edition. But it will drop when converted to drowned in Bedrock Edition. The armor is selected from:

• Chainmail armor with bolt armor trim in copper (4 in 7)
• Iron armor with flow armor trim in copper (2 in 7)
• Diamond armor with flow armor trim in copper (1 in 7).

Melee mobs spawn with a weapon selected from:

• Iron sword (4 in 7)
• Iron sword with Sharpness I (1 in 7)
• Iron sword with Knockback I (1 in 7)
• Diamond sword (1 in 7).

Ranged mobs spawn with a bow with:

• no enchantment (2 in 4)
• Power I (1 in 4)
• Punch I (1 in 4).

Ominous trial spawners converted from manually placed trial spawners continue to spawn the same mob as the trial spawner.

When at least one player is within the activation range of an ominous trial spawner, every 8 seconds it spawns ominous item spawners above any player or any mob that was spawned by the ominous trial spawner spawner within 14 blocks. The location where it should spawn is determined by first performing a raycast from the feet of the entity to a random height between 2 and 6 blocks above the entity. If it hits a block, this block is used, otherwise the end of the line is used. Which block can be hit is determined by the same algorithm as the 3rd person camera. The item spawns in the center of the block below it, unless the block has a collision box. The ominous item spawner displays a projectile for 3 to 6 seconds before shooting that projectile downwards.

Each ominous trial spawner has a set of 2 projectiles it spawns, one of which is a lingering potion. The lingering potion effect is selected randomly from one of the following (all with equal chance):

• Wind Charged
• Oozing
• Weaving
• Infested
• Strength
• Speed
• Slow Falling

The second projectile is randomly selected from one of the following (again, all with equal chance):

• Arrow
• Arrow with Poison (0:45)^[2]
• Arrow with Slowness IV (0:20)^[2]
• Small fireball
• Wind charge

The potions and projectiles chosen will not change between trials and are based on location, so it is likely that spawners very close to each other will have the same projectiles.

Ominous trial spawners in trial chambers eject different, better, rewards compared to the non-ominous state.

Like a normal trial spawner, it ejects loot once for each detected player. Instead of trial keys, an ominous trial spawner has a 30% chance to eject ominous trial keys, in which case it drops for all players. The other 70% of the time it drops one of the other items for each player. In Java Edition and Bedrock Edition, each trial chamber ominous trial spawner contains 1 item stack, with the following distribution:

Ominous trial spawners converted from manually placed trial spawners continue to drop the loot of a normal trial spawner (see Trial Spawner#Loot).

Ominous trial spawner can't be pushed by the piston, and can't be pulled by the sticky piston.

Java Edition:

v t e trial_spawner sound type
Sound	Closed captions	Source	Description	Identifier	Translation key	Volume	Pitch	Attenuation distance
	​Block broken	Blocks	Once the block has been broken	block.trial_spawner.break	subtitles.block.generic.break​	0.9	0.8	16
	​Block placed	Blocks	When the block is placed	block.trial_spawner.place	subtitles.block.generic.place​	1.0	0.8	16
	​Block breaking	Blocks	While the block is in the process of being broken	block.trial_spawner.hit	subtitles.block.generic.hit​	0.25	0.5	16
	​Something falls on a block	Entity-Dependent	Falling on the block with fall damage	block.trial_spawner.fall	subtitles.block.generic.fall​	0.5	0.75	16
	​Footsteps	Entity-Dependent	Walking on the block	block.trial_spawner.step	subtitles.block.generic.footsteps​	0.15	1.0	16

Bedrock Edition:

v t e trial_spawner sound type
Sound	Closed captions [upcoming]	Source	Description	Identifier	Translation key [upcoming]	Volume	Pitch
	​ ?	Blocks	Once the block has broken	trial_spawner.break	​ ?	1.0	0.8
	​ ?	Blocks	When the block is placed	trial_spawner.place	​ ?	1.0	0.8
	​ ?	Blocks	While the block is in the process of being broken	trial_spawner.hit	​ ?	0.38	0.5
	​ ?	Blocks	Falling on the block with fall damage	trial_spawner.step	​ ?	0.4	1.0
	​ ?	Blocks	Walking on the block	trial_spawner.step	​ ?	0.15	1.0
	​ ?	Blocks	Jumping from the block	trial_spawner.step	​ ?	0.12	1.0
	​ ?	Blocks	Falling on the block without fall damage	trial_spawner.step	​ ?	0.2	1.0

Java Edition:

Sounds
Sound	Closed captions	Source	Description	Identifier	Translation key	Volume	Pitch	Attenuation distance
	​Ominous crackling	Blocks	Randomly while active	block.trial_spawner.ambient_ominous	subtitles.block.trial_spawner.ambient_ominous​	0.75-1.0	0.5-1.5	16
	​Trial Spawner charges up	Blocks	When an ominous trial spawner is approached by a valid player	block.trial_spawner.detect_player	subtitles.block.trial_spawner.detect_player​	1.0	Varies[sound 1]	16
	​Trial Spawner spawns a mob	Blocks	When an ominous trial spawner spawns a mob	block.trial_spawner.spawn_mob	subtitles.block.trial_spawner.spawn_mob​	1.0	0.8-1.2	16
	​Trial Spawner opens	Blocks	When an ominous trial spawner's shutter opens	block.trial_spawner.open_shutter	subtitles.block.trial_spawner.open_shutter​	1.0	1.0	16
	​Trial Spawner closes	Blocks	When an ominous trial spawner's shutter closes	block.trial_spawner.close_shutter	subtitles.block.trial_spawner.close_shutter​	1.0	1.0	16
	​Trial Spawner ejects items	Blocks	When an ominous trial spawner ejects an item	block.trial_spawner.eject_item	subtitles.block.trial_spawner.eject_item​	1.0	0.8-1.2	16
	​Ominous item prepares	Friendly Mobs	When an ominous trial spawner is about to spawn an ominous item spawner	block.trial_spawner.about_to_spawn_item	subtitles.block.trial_spawner.about_to_spawn_item​	1.0	1.0	16
	​Ominous item drops	Blocks	When an ominous item spawner summons an item	block.trial_spawner.spawn_item	subtitles.block.trial_spawner.spawn_item​	1.0	0.8-1.2	16
	​Ominous item appears	Blocks	When an ominous item spawner is summoned	block.trial_spawner.spawn_item_begin	subtitles.block.trial_spawner.spawn_item_begin​	1.0	0.8-1.2	16
	​Omen engulfs Trial Spawner	Friendly Mobs	When a trial spawner becomes ominous	block.trial_spawner.ominous_activate	subtitles.block.trial_spawner.charge_activate​​subtitles.block.trial_spawner.ominous_activate​	Varies[sound 2]	0.8-1.2	16

Bedrock Edition:

Sounds
Sound	Closed captions [upcoming]	Source	Description	Identifier	Translation key [upcoming]	Volume	Pitch
	​ ?	Blocks	Randomly while active	trial_spawner.ambient_ominous	​ ?	0.75-1.0	0.5-1.5
	​ ?	Blocks	When an ominous trial spawner is approached by a valid player	trial_spawner.detect_player	​ ?	1.0	0.76-1.14
	​ ?	Blocks	When an ominous trial spawner spawns a mob	trial_spawner.spawn_mob	​ ?	1.0	0.8-1.2
	​ ?	Blocks	When an ominous trial spawner's shutter opens	trial_spawner.open_shutter	​ ?	1.0	1.0
	​ ?	Blocks	When an ominous trial spawner's shutter closes	trial_spawner.close_shutter	​ ?	1.0	1.0
	​ ?	Blocks	When an ominous trial spawner ejects an item	trial_spawner.eject_item	​ ?	1.0	0.8-1.1
	​ ?	Blocks	When an ominous trial spawner spawns a mob	trial_spawner.spawn_mob	​ ?	1.0	0.8-1.2
	​ ?	Blocks	When a trial spawner is about to spawn an ominous item spawner	ominous_item_spawner.about_to_spawn_item	​ ?	1.0	0.8-1.1
	​ ?	Blocks	When an ominous item spawner summons an item	ominous_item_spawner.spawn_item	​ ?	1.0	0.8-1.1
	​ ?	Blocks	When an ominous item spawner is summoned	ominous_item_spawner.spawn_item_begin	​ ?	1.0	0.8-1.1
	​ ?	Blocks	When a trial spawner becomes ominous	trial_spawner.charge_activate	​ ?	1.0	1.0

The ominous trial spawner is technically a block state of the trial spawner. Therefore, it has the same data value structure.

Java Edition
1.20.5 Experiment Update 1.21			24w13a				Added ominous trial spawners.
			pre1				Updated textures to match trial spawners.
1.21			24w18a				Ominous trial spawners are now available without using the "Update 1.21" experimental data pack.
							Ominous trial spawners with mobs that are unable to wear equipment now spawn double the total mob count over the course of the challenge.
							Bottle o' enchanting is no longer a possible projectile for ominous trial spawners.
			24w19a				Updated active and ejecting textures to be more consistent across all states as well as the trial spawner.
			pre2				Updated bottom texture to match Bedrock Edition.

Bedrock Edition
1.21.0 Experiment Update 1.21			Preview 1.21.0.20				Added ominous trial spawners.
			Preview 1.21.0.21				Ominous trial spawners now show a preview of the item that is about to be ejected.
1.21.0			Preview 1.21.0.22				Ominous trial spawners are now available without using the "Update 1.21" experimental toggle.
							Updated textures to match trial spawners.
1.21.20			Preview 1.21.10.20				Updated active and ejecting textures to be more consistent across all states as well as the trial spawner.

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

• 
  A breeze ominous trial spawner.
• 
  A slime ominous trial spawner.
• 
  A zombie ominous trial spawner.
• 
  A baby zombie ominous trial spawner.
• 
  A husk ominous trial spawner.
• 
  A skeleton ominous trial spawner.
• 
  A bogged ominous trial spawner.
• 
  A stray ominous trial spawner.
• 
  A spider ominous trial spawner.
• 
  A cave spider ominous trial spawner.
• 
  A silverfish ominous trial spawner.

• 
  Noor looking at an Ominous Trial Key.
• 
  A silverfish next to an ominous trial spawner.

v t e Blocks
Structural Wood/Hypha Logs Stripped Wood Stripped Stems Stripped Hyphae Stripped Block of Bamboo Stripped Bamboo Mosaic Planks Stone-based Stone Cobblestone Mossy Smooth Stone Stone Bricks Chiseled Cracked Mossy Granite Polished Diorite Polished Andesite Polished Deepslate Chiseled Cobbled Polished Deepslate Bricks Cracked Deepslate Tiles Cracked Tuff Chiseled Polished Tuff Bricks Chiseled Overworld Bricks Packed Mud Mud Bricks Block of Resin Resin Bricks Chiseled Sandstone Chiseled Cut Smooth Red Sandstone Chiseled Cut Smooth Prismarine Bricks Dark The Nether Netherrack Nether Bricks Chiseled Cracked Red Blackstone Polished Blackstone Chiseled Polished Blackstone Bricks Cracked Basalt Polished Smooth The End End Stone Bricks Purpur Block Pillar Ore/Mineral Block of Quartz Bricks Chiseled Pillar Smooth Block of Copper Chiseled Cut Grate Block of Iron Block of Gold Block of Amethyst Block of Coal Block of Diamond Block of Emerald Block of Lapis Lazuli Block of Netherite Block of Redstone
Ornamental Decorative Crying Obsidian Gilded Blackstone Honeycomb Block Reinforced Deepslate Partial Blocks Bars Iron Copper Chains Iron Copper Dirt Path Fences Wooden Nether Brick Slabs Cut Copper Wooden Stairs Cut Copper Wooden Walls Dyeable/Dyed Wool Carpets Terracotta Stained Glazed Concrete Powder Glass Pane Tinted Stained Glass Pane Lighting Candle Dyed End Rod Froglight Glowstone Jack o'Lantern Lantern Copper Soul Sea Lantern Torch Copper Soul BE & edu only Colored Torches Elements Hardened Glass Pane Hardened Stained Glass Pane
Natural Sediment/Soil Clay Dirt Coarse Grass Block Mycelium Podzol Rooted Gravel Mud Nylium Crimson Warped Sand Red Soul Sand Soil Misc. rock Bedrock Magma Block Obsidian Calcite Pointed Dripstone Block Ore/Mineral Amethyst Bud Cluster Budding Amethyst Ancient Debris Coal Ore Deepslate Copper Ore Deepslate Raw Block Diamond Ore Deepslate Emerald Ore Deepslate Gold Ore Deepslate Nether Raw Block Iron Ore Deepslate Raw Block Lapis Lazuli Ore Deepslate Nether Quartz Ore Redstone Ore Deepslate Plant Azalea Flowering Bamboo Shoot Beetroots Big Dripleaf Small Bush Cactus Carrots Cave Vines Chorus Plant Flower Cocoa Creaking Heart Dead Bush Fern Large Firefly Bush Hanging Roots Leaf Litter Leaves Lily Pad Mangrove Propagule Mangrove Roots Muddy Melon Stem Moss Block Carpet Pale Hanging Moss Pale Moss Block Carpet Potatoes Pumpkin Carved Stem Resin Clump Saplings Seagrass Tall Short Dry Grass Tall Short Grass Tall Sugar Cane Sweet Berry Bush Vines Wheat Crops Hay Bale Flower Allium Azure Bluet Blue Orchid Cactus Flower Cornflower Dandelion Golden​[upcoming First Drop 2026] Eyeblossom Closed Open Lilac Lily of the Valley Oxeye Daisy Peony Pink Petals Pitcher Plant Crop Poppy Rose Bush Spore Blossom Sunflower Torchflower Crop Tulips Wildflowers Wither Rose Fungus & Related Nether Fungi Crimson Warped Glow Lichen Mushrooms Brown Red Blocks Stem Nether Sprouts Nether Wart Wart Block Nether Warped Crimson Roots Warped Roots Shroomlight Twisting Vines Weeping Vines Fauna & algae Coral Dead Coral Blocks Dead Coral Fans Dead Dried Ghast Kelp Dried Block Sea Pickle Fauna/Related Bee Nest Bone Block Cobweb Dragon Egg Frogspawn Infested Blocks Sniffer Egg Turtle Egg Sculk Sculk Sculk Catalyst Sculk Sensor Calibrated Sculk Shrieker Sculk Vein Fluid & Related Lava Water Bubble Column Ice Blue Packed Snow Powder Block Non-physical Air Cave‌[JE only] Void‌[JE only] Invisible Bedrock‌[BE & edu only] Fire Soul
Utility Interactable Anvil Chipped Damaged Barrel Beacon Brewing Stand Cartography Table Chest Ender Copper Crafting Table Enchanting Table Furnace Blast Smoker Grindstone Lectern Loom Shulker Box Dyed Sign Hanging Smithing Table Stonecutter Utilizable Banners Ominous Beehive Beds Bell Bookshelf Cake with Candle Campfire Soul Cauldron Chiseled Bookshelf Composter Conduit Copper Golem Statue Decorated Pot End Gateway End Portal End Portal Frame Farmland Fletching Table Flower Pot Frosted Ice Heads Skeleton Wither Skeleton Zombie Creeper Piglin Dragon Heavy Core Jukebox Ladder Lodestone Monster Spawner Nether Portal Respawn Anchor Scaffolding Shelf Sponge Wet Suspicious Gravel Suspicious Sand TNT Trial Spawner Ominous Vault Ominous Redstone/ Mechanical Buttons Wooden Stone Polished Blackstone Copper Bulb Crafter Daylight Detector Dispenser Dropper Doors Copper Iron Wooden Honey Block Hopper Lever Lightning Rod Note Block Observer Piston Sticky Pressure Plates Wooden Stone Polished Blackstone Heavy Weighted Light Weighted Rail Activator Detector Powered Redstone Lamp Redstone Wire Comparator Repeater Torch Slime Block Target Trapped Chest Trapdoors Copper Iron Wooden Fence Gates Tripwire Hook Tripwire BE & edu only Allow Border Chalkboards Compound Creator Deny Element Constructor Heat Block Item Frame Glow Lab Table Material Reducer Underwater TNT Underwater Torch
Creative or commands only All editions Barrier Command Block Chain Repeating Jigsaw Block Light Petrified Oak Slab Player Head Structure Block Void Java Edition only Test Block Test Instance Block China Edition only mod_ore micro_block
Removed All editions Grassless Dirt Seamless Stone Slab Java Edition only Cloth Dead Coral Block Gear Lava Spawner Locked chest Rose Potted Shrub Water Spawner Bedrock Edition only Blue Rose grass_carried leaves_carried Fern Fern Smooth Stone Bricks Structure Air mysterious_frame_slot MinecraftEdu only Big Sign Border block Build allow block Build disallow block Foundation block Home Block Information block Information Sign Number Block Spawn Block Steppe sand Steppe dirt Teleport Block Quiz block Minecraft 4k only ID 9 Dirt XOR Block
Unused Bedrock Edition only Chalkboard BE & edu only Camera Block Chiseled Purpur tile.client_request_placeholder_block.name Deprecated Anvil tile.deprecated_purpur_block_2.name Glowing Obsidian tile.info_update.name tile.info_update2.name Nether Reactor Core tile.reserved6.name Stonecutter (old) Unknown
Unimplemented All editions Blue Berries Branches Copper Button Colored Planks Coral Slab Dead Dirt Slab Empty Barrel Fish Barrel Furniture Paeonia Sand Layer Sculk Jaw Spike Block Wax Block
Joke April Fools 2013 Block of Coal Etho Slab Tinted Glass Torch (Burnt-out) April Fools 2016 USB Charger Block April Fools 2020 An Ant Box of Infinite Books Cursor Funky Portal Leftover Swaggiest stairs ever April Fools 2022 How did we get here? April Fools 2023 Cheese Copper Sink Filled Copper Spleaves Golden Chest Other Portal Packed Air Pickaxe Block Place Block April Fools 2024 Baked Potato Bricks Expired Charred Big Brain Block of Amber Block of Potato Peels Corrupted Floatater Floatato Frying Table Gravtater Pedestal Peelgrass Block Corrupted Poison Farmland Poison Path Poisonous Mashed Potato Poisonous Potato Block Compressed Double Compressed Triple Compressed Quadruple Compressed Poisonous Potato Cutter Poisonous Potato Head Block Poisonous Potato Headpiece Poisonous Potato Ore Deepslate Potato Battery Potato Bud Potato flower Potato Fruit Potato Leaves Potato Pedicule Potato Portal Potato Refinery Potato Sprouts Potato Stem Planks Slab Stairs Door Trapdoor Button Pressure Plate Sign Hanging Sign Fence Fence Gate Potone Copper Ore Diamond Ore Gold Ore Iron Ore Lapis Lazuli Ore Redstone Ore Resin Ore Powerful Potato Strong Roots Taterstone Terre de Pomme Vicious Potato Weak Roots April Fools 2025 Dimension Control Mine Travelling Block Mine Revisitor Mine Crafter Mob Trophy Shimmering Door Sky Trophy
Extreme metadata variants All editions Directionless Hopper Seamless Stone Slab Six-sided Hay Bale Six-sided Piston Java Edition only Faceless Furnace Faceless Jack o'Lantern Green Shrub Potted Invisible stairs Misaligned torch Redstone Nether portal post Overripe Melon Stem Attached Overripe Pumpkin Stem Attached Overgrown Cocoa Overeaten Cake Overgrown Wheat Crops Potted non-flower block Snowy Dirt Coarse Strange buttons Others Bedrock Edition only Bell Stand Diorite Bell Granite Bell Polished Six-sided Bone Block Six-sided Purpur Pillar Six-sided Quartz Pillar Smokeless Campfire