Biomes and the auras they unlock

The server rolls for a biome every second. While one is active, its biome-native auras get easier and its biome-exclusive auras become possible at all. Below: each biome's chance and duration, and the cross-table of the auras tied to it.

Every biome at a glance

Biome	Spawn chance	Duration	Biome auras
Normal	—	—	0
Windy	1 in 500	2 minutes	7
Snowy	1 in 600	2 minutes	5
Rainy	1 in 750	2 minutes	12
Sandstorm	1 in 3,000	650 seconds (10 minutes 50 seconds)	6
Hell	1 in 6,666	666 seconds (11 minutes 6 seconds)	10
Starfall	1 in 7,500	650 seconds (10 minutes 50 seconds)	11
Heaven	1 in 7,777	240 seconds (4 minutes)	12
Lost Forest	1 in 8,128	450 seconds (7 minutes 30 seconds)	17
Corruption	1 in 9,000	650 seconds (10 minutes 50 seconds)	7
Null	1 in 10,100	99 seconds (1 minute 39 seconds)	5
Singularity	1 in 100	20 minutes, or until someone rolls Astraios	12
The Radiant Forest	Summoned with the Condensed Memory item inside Lost Forest during Nighttime	900 seconds (15 minutes)	12
Cyberspace	1 in 5,000	12 minutes	19
Dreamspace	1 in 3,500,000	192 seconds (3 minutes 12 seconds)	5
Glitched	1 in 30,000	164 seconds (2 minutes 44 seconds)	7
Graveyard	1 in 3	Until Nighttime ends	15
Pumpkin Moon	1 in 3	Until Nighttime ends	11
Blazing Sun	1 in 4	3 minutes	23
Blood Rain	Summoned with a Cursed Rune Fragment from Fischl's shop during Graveyard or Pumpkin Moon	10 minutes	10
Aurora	1 in 50,000	5 minutes	19
Eggland	Replaces the Normal biome during the 2026 Easter event	Lasts while the Easter event replaces Normal	0
Incinerator	1 in 10	200 seconds (3 minutes 20 seconds)	21

Spawn chance is per second, as the wiki lists it.

Regular biomes

Normal

—

Default biome of the game; returns after other biomes end
Has no biome-native auras
Replaced by Snowy during Christmas events and by Eggland during Easter events

Windy

1 in 500 every second · 2 minutes

Breakthrough multiplier 3x

Boosts the odds of Windy-native auras such as Wind, Stormal and Maelstrom
Spawns Wind Essence items
Wind Essence offered to the Grail of Resonance gives +2% Luck and +1% Roll Speed

Snowy

1 in 600 every second · 2 minutes

Breakthrough multiplier 3x

Boosts the odds of Snowy-native auras such as Glacier, Permafrost and Blizzard
Turns the ground white and covers the map in a thin mist
Replaces the Normal biome during Christmas events

Rainy

1 in 750 every second · 2 minutes

Breakthrough multiplier 4x

Boosts the odds of Rainy-native auras and one Rainy-exclusive aura
Rain falls and the sky is covered in gray fog

Sandstorm

1 in 3,000 every second · 650 seconds (10 minutes 50 seconds)

Breakthrough multiplier 4x

Added in the Era 9 update
Boosts the odds of Sandstorm-native auras
Replaces the grass with sand and turns tree leaves yellowish

Hell

1 in 6,666 every second · 666 seconds (11 minutes 6 seconds)

Breakthrough multiplier 6x

Added in the Era 7 update
Boosts the odds of Hell-native auras and one Hell-exclusive aura
Turns leaves red and water into lava

Starfall

1 in 7,500 every second · 650 seconds (10 minutes 50 seconds)

Breakthrough multiplier 5x

Boosts the odds of Starfall-native auras
Stars fall from a dark blue sky
Stella's Star has a 5% chance to spawn in the cave instead of potions and coins

Heaven

1 in 7,777 every second · 240 seconds (4 minutes)

Breakthrough multiplier 5x

Added in the Eon 1-12 update
Boosts the odds of Heaven-native auras
Turns the map yellow with mist and a glowing sigil at the top

Lost Forest

1 in 8,128 every second · 450 seconds (7 minutes 30 seconds)

Breakthrough multiplier 2x

Added in the Eon 1-30 update
Boosts the odds of Lost Forest-native auras
Needed to use the Condensed Memory item that spawns The Radiant Forest

All 17 Lost Forest auras in the catalog →

Corruption

1 in 9,000 every second · 650 seconds (10 minutes 50 seconds)

Breakthrough multiplier 5x

Added in the Era 7 update
Boosts the odds of Corruption-native auras and one exclusive aura
Purple fog and particles cover the map and water turns purple

Null

1 in 10,100 every second · 99 seconds (1 minute 39 seconds)

Breakthrough multiplier 1000x

Turns the map gray and obscures vision with mist
Has one special aura, four unique auras and one exclusive aura
Required to open the way into The Limbo

Rare biomes

Singularity

1 in 100 chance to replace Starfall when it spawns; also summoned with a Singularity Catalyst · 20 minutes, or until someone rolls Astraios

Breakthrough multiplier 5x

Has three unique auras and nine exclusive auras
Witnessing the spawn cutscene grants the Accretion Disk buff
Added in Eon 1-20

The Radiant Forest

Summoned with the Condensed Memory item inside Lost Forest during Nighttime · 900 seconds (15 minutes)

Breakthrough multiplier 2x

Locks the time to Nighttime while active
Moon Catch: caught stars grant Cor Lunae's Blessing, +0.015x final luck per stack, up to 10 stacks
Has four special, four unique and four exclusive auras

Cyberspace

1 in 5,000 when using the Strange Controller or Biome Randomizer · 12 minutes

Breakthrough multiplier 2x

Added in Eon 1-11 as a rare biome
Has 17 unique auras and two exclusive auras
Illusionary is obtainable here and is not affected by Luck effects

All 19 Cyberspace auras in the catalog →

Dreamspace

1 in 3,500,000 every second during the Normal biome · 192 seconds (3 minutes 12 seconds)

Pink-themed biome with floating pink furniture and mist
Home of the Dreamspace-exclusive auras
Dreamspace auras can no longer be rolled during the Glitched biome

Glitched

1 in 30,000 chance at every biome change · 164 seconds (2 minutes 44 seconds)

Rarest biome; trees turn to glitchy fuzz under a pitch-black sky
Native auras ignore breakthrough odds and roll at native rarity, except rare-biome auras
Four unique auras that cannot be obtained in any other biome
First encounter grants a hidden achievement