Simulacrum

What a fog bank becomes once it reaches full Deliriousness: a fixed run of waves in a closed arena, each one harder than the last, with a choice of how it gets harder made between them.

Waves7
To enter A fog bank at 100% Deliriousness turns one of its maps into a Simulacrum

Seven is the game data's own figure. Guides carrying a fifteenth or twentieth wave are describing Path of Exile 1's Simulacrum, which was a longer encounter.

Getting one

Each line below is the item's own instruction text.

Simulacrum SplinterCombine 300 Splinters to create a Simulacrum.
SimulacrumRight click this item then left click an Endgame World Area affected by at least 100% Delirousness to apply it.

Inside, each wave is started by interacting with a Trail of Suffering. A Simulacrum you leave unfinished becomes a Fading Simulacrum.

Between waves

A shard appears between waves offering one of three escalations. Each applies to all remaining waves, so an early pick compounds.

Escalating ThreatsAdds an Area ModifierAdds an additional Modifier to the area. These modifiers generally add danger and reward. These modifiers will apply for all remaining waves in the Simulacrum.
Apex PredatorsSpawn an additional BossAdds an additional Boss to the encounter. Additional bosses will be summoned into all remaining waves in the Simulacrum.
Pure EmotionsSpawns additional MonstersAdds additional monster packs to the encounter. Additional monster packs will be added to all remaining waves in the Simulacrum.

Escalating Threats

The pool an Escalating Threats shard draws its modifier from. Most pair a danger with the reward that justifies it.

Monsters have 100% increased Critical Hit Chance60% more Rarity of Items found in this Area
Monsters deal 15% of Damage as Extra Chaos25% increased Quantity of Items found in this Area
Monsters deal 20% of Damage as Extra Cold60% more Rarity of Items found in this Area
Monsters deal 20% of Damage as Extra Fire60% more Rarity of Items found in this Area
Monsters deal 20% of Damage as Extra Lightning60% more Rarity of Items found in this Area
15% increased Monster Damage60% more Rarity of Items found in this Area
Monsters gain 15% of maximum Life as Extra maximum Energy ShieldMonsters are ArmouredMonsters are EvasiveMonsters grant 60% increased Experience
20% more Monster LifeMonsters grant 60% increased Experience
Monsters have 50% more Effectiveness
Rare Monsters have a 100% increased chance of Monster Modifiers
100% more Magic and Rare MonstersRare Monsters have 100% more chance of Monster Modifiers
+30% Monster Elemental ResistancesMonsters grant 60% increased Experience
Monsters have 15% increased Skill Speed60% more Rarity of Items found in this Area
Monsters have 50% increased Stun ThresholdMonsters have 50% increased Ailment ThresholdMonsters grant 60% increased Experience

Wave modifiers

The modifiers the waves themselves roll, grouped by effect. They read like map modifiers because they are the same shape - see modifiers for the rest.

T1(15–19)% increased Monster Damage
T2(20–24)% increased Monster Damage
T3(25–30)% increased Monster Damage
T1(20–24)% more Monster Life
T2(25–29)% more Monster Life
T3(30–35)% more Monster Life
T10% increased Monster Attack SpeedMonsters have 10% chance to Maim on Hit with Attacks
T20% increased Monster Attack SpeedMonsters have 25% chance to Maim on Hit with Attacks
T10% increased Monster Cast SpeedMonsters have 10% chance to Hinder on Hit with Spells
T20% increased Monster Cast SpeedMonsters have 25% chance to Hinder on Hit with Spells
T10% increased Monster Movement SpeedMonsters' Action Speed cannot be modified to below base value
T20% increased Monster Movement SpeedMonsters' Action Speed cannot be modified to below base value
T140% less effect of Curses on MonstersMonsters have 20% chance to inflict a random Hex on Hit
T250% less effect of Curses on MonstersMonsters have 50% chance to inflict a random Hex on Hit
T366% less effect of Curses on MonstersMonsters inflict a random Hex on Hit
T18% increased Monster Movement Speed8% increased Monster Cast Speed8% increased Monster Attack Speed
T212% increased Monster Movement Speed12% increased Monster Cast Speed12% increased Monster Attack Speed
T316% increased Monster Movement Speed16% increased Monster Cast Speed16% increased Monster Attack Speed
T1Monsters deal (15–19)% of Physical Damage as Extra Chaos+20% Monster Chaos Resistance
T2Monsters deal (20–24)% of Physical Damage as Extra Chaos+30% Monster Chaos Resistance
T3Monsters deal (25–30)% of Physical Damage as Extra Chaos+40% Monster Chaos Resistance
T1Monsters deal (15–19)% of Physical Damage as Extra ChaosMonster Damage penetrates 5% of Chaos Resistance
T2Monsters deal (20–24)% of Physical Damage as Extra ChaosMonster Damage penetrates 7% of Chaos Resistance
T3Monsters deal (25–30)% of Physical Damage as Extra ChaosMonster Damage penetrates 10% of Chaos Resistance
T1Monsters deal (15–19)% of Physical Damage as Extra ChaosMonsters Poison on Hit
T2Monsters deal (20–24)% of Physical Damage as Extra ChaosMonsters Poison on Hit
T3Monsters deal (25–30)% of Physical Damage as Extra ChaosMonsters Poison on Hit
T1Monsters deal (60–69)% of Physical Damage as Extra Cold+30% Monster Cold Resistance
T2Monsters deal (70–79)% of Physical Damage as Extra Cold+40% Monster Cold Resistance
T3Monsters deal (80–100)% of Physical Damage as Extra Cold+50% Monster Cold Resistance
T1Monsters deal (60–69)% of Physical Damage as Extra ColdMonster Damage penetrates 5% of Cold Resistance
T2Monsters deal (70–79)% of Physical Damage as Extra ColdMonster Damage penetrates 7% of Cold Resistance
T3Monsters deal (80–100)% of Physical Damage as Extra ColdMonster Damage penetrates 10% of Cold Resistance
T1Monsters deal (60–69)% of Physical Damage as Extra ColdMonsters have 33% chance to inflict Brittle
T2Monsters deal (70–79)% of Physical Damage as Extra ColdMonsters have 66% chance to inflict Brittle
T3Monsters deal (80–100)% of Physical Damage as Extra ColdMonsters inflict Brittle
T1Monsters deal (60–69)% of Physical Damage as Extra Fire+30% Monster Fire Resistance
T2Monsters deal (70–79)% of Physical Damage as Extra Fire+40% Monster Fire Resistance
T3Monsters deal (80–100)% of Physical Damage as Extra Fire+50% Monster Fire Resistance
T1Monsters deal (60–69)% of Physical Damage as Extra FireMonster Damage penetrates 5% of Fire Resistance
T2Monsters deal (70–79)% of Physical Damage as Extra FireMonster Damage penetrates 7% of Fire Resistance
T3Monsters deal (80–100)% of Physical Damage as Extra FireMonster Damage penetrates 10% of Fire Resistance
T1Monsters deal (60–69)% of Physical Damage as Extra FireMonsters have 33% chance to inflict Scorch
T2Monsters deal (70–79)% of Physical Damage as Extra FireMonsters have 66% chance to inflict Scorch
T3Monsters deal (80–100)% of Physical Damage as Extra FireMonsters inflict Scorch
T1Monsters deal (60–69)% of Physical Damage as Extra Lightning+30% Monster Lightning Resistance
T2Monsters deal (70–79)% of Physical Damage as Extra Lightning+40% Monster Lightning Resistance
T3Monsters deal (80–100)% of Physical Damage as Extra Lightning+50% Monster Lightning Resistance
T1Monsters deal (60–69)% of Physical Damage as Extra LightningMonster Damage penetrates 5% of Lightning Resistance
T2Monsters deal (70–79)% of Physical Damage as Extra LightningMonster Damage penetrates 7% of Lightning Resistance
T3Monsters deal (80–100)% of Physical Damage as Extra LightningMonster Damage penetrates 10% of Lightning Resistance
T1Monsters deal (60–69)% of Physical Damage as Extra LightningMonsters have 33% chance to inflict Sapped
T2Monsters deal (70–79)% of Physical Damage as Extra LightningMonsters have 66% chance to inflict Sapped
T3Monsters deal (80–100)% of Physical Damage as Extra LightningMonsters inflict Sapped
T1Monsters fire 2 additional Projectiles
T2Monsters fire 3 additional Projectiles
T1Monsters have (151–200)% increased Critical Hit ChanceMonsters have +(20–30)% Critical Damage BonusMonsters take (20–24)% reduced Extra Damage from Critical Hits
T2Monsters have (201–250)% increased Critical Hit ChanceMonsters have +(31–40)% Critical Damage BonusMonsters take (25–29)% reduced Extra Damage from Critical Hits
T3Monsters have (251–300)% increased Critical Hit ChanceMonsters have +(41–50)% Critical Damage BonusMonsters take (30–35)% reduced Extra Damage from Critical Hits
T1Monsters have 20% chance to remove a Flask Charge on Hit
T2Monsters have 40% chance to remove a Flask Charge on Hit
T1Monsters have 5% chance to remove Charges on Hit
T2Monsters have 10% chance to remove Charges on Hit
T1Monsters have 50% chance to Impale with Attacks
T2Monsters have 75% chance to Impale with Attacks
T1Monsters have 50% chance to inflict Brittle
T2Monsters have 80% chance to inflict Brittle
T1Monsters have 50% chance to inflict Sapped
T2Monsters have 80% chance to inflict Sapped
T1Monsters have 50% chance to inflict Scorch
T2Monsters have 80% chance to inflict Scorch
T1Monsters have 60% increased Area of Effect
T2Monsters have 80% increased Area of Effect
T1Monsters have a 15% chance to cause Elemental Ailments on Hit33% reduced Effect of Non-Damaging Ailments on Monsters
T2Monsters have a 20% chance to cause Elemental Ailments on Hit50% reduced Effect of Non-Damaging Ailments on Monsters
T3Monsters have a 30% chance to cause Elemental Ailments on Hit66% reduced Effect of Non-Damaging Ailments on Monsters
T1Monsters have a 15% chance to cause Elemental Ailments on HitMonster Damage Penetrates 5% Elemental Resistances
T2Monsters have a 20% chance to cause Elemental Ailments on HitMonster Damage Penetrates 7% Elemental Resistances
T3Monsters have a 30% chance to cause Elemental Ailments on HitMonster Damage Penetrates 10% Elemental Resistances
T1Monsters Overwhelm 5% Physical Damage Reduction+10% Monster Physical Damage Reduction
T2Monsters Overwhelm 7% Physical Damage Reduction+15% Monster Physical Damage Reduction
T3Monsters Overwhelm 10% Physical Damage Reduction+25% Monster Physical Damage Reduction
T1Monsters Overwhelm 5% Physical Damage ReductionMonsters have 10% chance to Impale with Attacks
T2Monsters Overwhelm 7% Physical Damage ReductionMonsters have 20% chance to Impale with Attacks
T3Monsters Overwhelm 10% Physical Damage ReductionMonsters have 25% chance to Impale with Attacks
T1Monsters remove 2% of Mana on hit
T2Monsters remove 4% of Mana on hit
T1Monsters' skills Chain 2 additional times
T2Monsters' skills Chain 3 additional times

Single-strength

+0 to Level of dropped Reward Items0% increased Experience gain
+0 to Level of dropped Reward Items0% increased Experience gain
All Damage from Monsters' Hits Contributes to Chill Magnitude
All Damage from Monsters' Hits Contributes to Shock Chance
All Monster Damage from Hits always Ignites

Unique drops

The uniques the game data attributes to a Simulacrum boss. Players report more drop here, including Megalomaniac and Voices, but the game data records no source for those - so they aren't listed.

AssailumDrops from Kosis, The Revelation
Collapsing HorizonDrops from Kosis, The Revelation
Melting MaelstromDrops from Kosis, The Revelation
PerfidyDrops from Kosis, The Revelation

Harder variant

A separate, stronger pool exists alongside the one above - the same effects at values the normal pool never reaches.

(36–40)% more Monster Life
Monsters deal (101–110)% of Physical Damage as Extra Cold+(51–80)% Monster Cold Resistance
Monsters deal (101–110)% of Physical Damage as Extra Fire+(51–80)% Monster Fire Resistance
Monsters deal (101–110)% of Physical Damage as Extra Lightning+(51–80)% Monster Lightning Resistance
Monsters deal (31–40)% of Physical Damage as Extra Chaos+(41–60)% Monster Chaos Resistance
Monsters have (301–330)% increased Critical Hit ChanceMonsters have +(50–60)% Critical Damage BonusMonsters take 35% reduced Extra Damage from Critical Hits
Monsters have (41–50)% chance to remove a Flask Charge on Hit
Monsters Overwhelm 15% Physical Damage Reduction+40% Monster Physical Damage Reduction