Delirium

Walk through a mirror and a ring of fog rolls out across the map. Everything inside it hits harder, takes less, and drops more - and the fog keeps moving, so the encounter lasts exactly as long as you keep up with it.

Delirium

Maps containing a Delirium Mirror can have the mirror walked through to unleash the rolling Delirium fog ring across the current area.

You must stay within this fog as it expands to maintain the Delirium or it will disappear.

Magic monsters are able to gain Delirium specific Modifiers while inside the fog.

Rare or Unique monsters in the fog may manifest Delirium Demons. Manifested Delirium Demons inhabit the monster's body to occasionally use Skills of their own.

Fractured Mirrors may be found within Delirium Fog, summoning extra monsters while Fracturing Mirror Shards are found at set depths, with more varied rewards.

Defeating Map Bosses has a chance to summon a Grand Mirror on a nearby map.

Delirious Players

Delirious players are assaulted by illusions, making combat more difficult. Higher delirium causes monsters to deal more damage and have additional Toughness. It can also cause additional monsters to appear or can grant additional modifiers to existing monsters. Monster item drops are improved by higher delirium.

Maps within Fog Banks gain Deliriousness as Map Bosses, Rare Monsters or Unique Monsters are killed.

Grand Mirror

A Grand Mirror causes a reflection of the Map Boss. When the bosses are defeated Delirium fog spreads to nearby Maps.

When the fog reaches 100% Deliriousness one of the remaining maps will be transformed into a Simulacrum.

A Waystone that carries one reads “Areas contain a Mirror of Delirium”.

Fracturing Mirrors

Fracturing Mirrors are structures found in Delirium Fog that shatter when you get near them, spawning Delirium monsters. Occasionally Fracturing Mirrors Shards may appear with other bonuses, such as adding Liquid Emotions to monsters or summoning a Mirrored Boss.

Escalation ShardsEscalation Shards may add modifiers to rare Delirium monsters, summoning more difficult and rewarding monsters, or pausing the Fog.

Deceptive ShardsDeceptive Shards summon Delirium bosses or lead to an extra Delirious area.

Capricious ShardsCapricious Shards do not manifest by default, once unlocked they may summon a mirrored Map Boss, or cause Map Bosses to manifest Grand Mirrors.

How Deliriousness builds

The rates behind the effect described above, from the game's own constants.

Fog Lowest Waystone tier that can contain Delirium Fog: 6 100% Base maximum Deliriousness of a fog bank 10% Deliriousness a new fog bank starts at

Deliriousness gained 1% per Rare Monster slain 3% per Unique Monster slain 10% on completing a Map

Simulacrum Waves in a Simulacrum: 7 100% Deliriousness before a map becomes a Simulacrum

The maximum above is the game data's base figure. Community guides describe fog reaching twice that, which is consistent with something raising it - the Delirium atlas passives below adjust how fog spreads and how deeply it builds.

Grand Mirrors come from Capricious Shards, which is why they only start appearing once that shard class is unlocked. The Simulacrum a fog bank seeds at 100% is its own encounter, and the questline that unlocks all of it is its own page.

Manifested Demons

A Rare or Unique monster inside the fog can manifest a demon, which inhabits its body and uses skills of its own. Four elements, in a stronger form on Unique monsters.

From Rare monstersColdFireLightningPhysical

From Unique monstersColdFireLightningPhysical

Items

The Liquid Emotions have their own page.

Distorted AmuletAmulets

Twisted AmuletAmulets

Raven-Touched ShardAugment

Raven's ReflectionMap Fragments

SimulacrumMap Fragments

Raven's ReflectionQuest Items

Essence of DeliriumStackable Currency

Simulacrum SplinterStackable Currency

Tangmazu's ThuribleSupport Gems

Trickster's ShardSupport Gems

Delirium TabletTablet

Tangmazu's Reliquary KeyVault Keys

Loathsome Mire

A side area a Deceptive Shard can open off the fog. Level 80. Its floor is flooded, and the liquid flows - following the flow is what leads you through it.

Standing in the liquidYou are taking Physical and Chaos damage over time Step onto dry ground to stop taking it. Players report the effect stacks up to ten times.

What it pays

Two amulet bases exist only for Delirium, and each trades a modifier slot away. Players report they are the Mire's reward, arriving pre-instilled with two notables - the game data carries the bases and their trade-off, but not where they drop.

Twisted Amulet-1 Prefix Modifier allowed+0 Suffix Modifier allowed

Distorted Amulet+0 Prefix Modifier allowed-1 Suffix Modifier allowed

Tablets

Can be used in a personal Map Device to add modifiers to a Map. Its modifier pool renders at delirium tablet.

Delirium TabletAdds a Mirror of Delirium to a Map10 uses remaining

Clear SkiesThe one unique tablet - it changes the mechanic rather than its numbers.Delirium Fog in your Maps never dissipatesDelirium Fog in Area applies (-10–10)% reduced Deliriousness to Players