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Quick Guide: This article has a quick guide that shows you how to use the Scout Tower strategy to complete a Blighted Map encounter.

For the skill gem, see Blight.

An exile during a Blight encounter

Blights are tower defense-like encounters that can spawn from Fungal Growths. There is around a 8% chance to find a Fungal Growth in any map area, which will always be accompanied by Sister Cassia. The chance can be increased by atlas passive skills.

Blight encounters are also found in Blighted maps, which are a modified type of map with a large open layout (often Park Map, Pit Map or related), that have all the monsters removed saved for a single special Blight encounter. Blight encounters in Blighted maps are far larger, have many more monsters and have much greater rewards. Players can trade Blighted maps.

Mechanics

A Fungal Growth

Once players interact with the Fungal Growth, Cassia will place a purification pump on the growth, causing it to spawn roots in random directions. At the end of each root is a portal that spawns enemies that slowly move towards the core, only stopping to attack units in its way. The Blight can spawn up to 8 roots, increasing with zone level. Players will be given a short preparation time before the Blight starts spawning monsters. Players can skip this by pressing a button that appears on the bottom right during this preparation period.

Some roots will spawn after a delay, and sometimes a root will have multiplied monster density (indicated by a multiplier). An icon corresponding to a tower can appear over each root, indicating which tower it is resistant to. Along the paths of the roots, players can construct a tower in specified areas. Towers cost resources to build or upgrade, which are given at the start and also acquired from killing blighted enemies.

When an enemy reaches the core, it will lower the durability of the pump and despawn itself. The pump has 10 durability, and the amount of durability lowered is based on the monster's rarity (1 for normal, 2 for magic, 5 for rare, 10 for unique). When the pump's durability reaches 0, the Blight encounter fails and monsters will stop spawning.

Once all enemies from each portal are defeated, chests will spawn at the locations of each portal. These chests persist even if the pump gets destroyed afterwards. Blights always reward at least one oil or one Blighted map.

Blights were introduced in the Blight league. Characters must complete least 1 blight encounter before Cassia will anoint items.

Spawn chance

Blights were the main focus of the temporary Blight leagues. After the leagues ended, Blight was added to the core game, but spawns much less often than in the Blight leagues. By default maps have an 8% chance to have a Blight encounter.[1]

In some leagues, a Zana crafted mod allows players to force Blight to spawn. The Zana mod also has a hidden property that sets the league flag of the map to the Blight league flag,[2], which is necessary to chance some of the unique items released in the Blight league. GGG also declared some unique are added to core drop pool in the version 3.14.0 reveal video, such as Blight-specific unique Badge of the BrotherhoodBadge of the Brotherhood
Turquoise Amulet
Requires Level 60+(16-24) to Dexterity and Intelligence(7-10)% increased Cooldown Recovery Rate of Travel Skills per Frenzy Charge
(7-10)% increased Effect of Elusive on you per Power Charge
(20-25)% chance to lose a Frenzy Charge when you use a Travel Skill
(20-25)% chance to lose a Power Charge when you gain Elusive
Your Maximum Frenzy Charges is equal to your Maximum Power Charges
Greater than any blade, agility and intellect will be your weapons.
.

In addition, by allocating Lira Arthain atlas passive Spores on the Wild, that atlas region can drop maps with the enchantment Area contains an additional Blight Encounter. It is uncertain whether the enchantment is equivalent to the Zana mod or not.

Lastly, using Blight Scarab can also force spawn Blight encounter. However, this is not stackable to other source of the Blight encounter.

Strategy

  • Rare and/or Unique Enemies are capable of moving faster and having more life. They are also capable of running past a characters minions instead of stopping and attacking them like normal and magic enemies do.(unconfirmed) These three factors make it easy for them to run past a player with low offense and/or nothing to slow them down. Using slow effects and/or knockback can help to give the player time before the enemy reaches the pump. With a lot of hits per second and knockback and slow, it is possible to not have to worry about the enemy reaching the pump no matter how much time passes. This can be very useful for characters who have low damage.
  • Towers - In most situations empowering towers are the best tower per cost. They upgrade the power of multiple useful towers nearby. Some towers have multiple effects that are affected by empowering towers. This makes empowering towers improve those towers more than others. Each tower can only be upgraded by 1 empowering tower max. Choosing between damage and/or slowing towers will depend on your build. A build with pretty good damage but no slowing effects on enemies will probably do best with towers that slow enemies. A build with plenty of slow and knockback effects, but not so great damage, will probably want damaging towers. Enemies can resist some towers greatly and therefore varying damage types and/or slow types will increase the chances of enemies being affected significantly by your towers. Rings can be anointed with the same tower mod on both to stack. This can be useful for stronger mods like Your Temporal Towers also grant you 20% increased action speed, which give 40% action speed with 2 rings. Action speed does not affect minions or other players

Towers

List of towers

Main page: List of towers
Name Tier Cost Radius Description Icon
Arc Tower IV 500 45 Damage: Medium
Casts Arc

Ineffective against Blighted Monsters of the same type
Arcing tower icon.png
Chilling Tower Mk I I 100 35 Damage: Low
Chills and Damages nearby enemies

Ineffective against Blighted Monsters of the same type
Cold tower icon.png
Chilling Tower Mk II II 150 35 Increased Damage
Increased effect of Chill
Affects more Targets
Cold tower icon.png
Chilling Tower Mk III III 300 35 Increased Damage
Increased effect of Chill
Affects more targets
Cold tower icon.png
Empowering Tower Mk I I 100 35 Improves the effectiveness of other Towers
Does not Damage Enemies
Buff tower icon.png
Empowering Tower Mk II II 150 45 Improves the effectiveness of other Towers
Does not Damage Enemies
Buff tower icon.png
Empowering Tower Mk III III 300 55 Improves the effectiveness of other Towers
Does not Damage Enemies
Buff tower icon.png
Fireball Tower Mk I I 100 45 Damage: Medium
Casts a Fireball

Ineffective against Blighted Monsters of the same type
Fire tower icon.png
Fireball Tower Mk II II 150 60 Casts 3 Fireballs Fire tower icon.png
Fireball Tower Mk III III 300 75 Casts 5 Fireballs Fire tower icon.png
Flamethrower Tower IV 500 45 Damage: High
Casts a stream of Fire

Ineffective against Blighted Monsters of the same type
Flamethrower tower icon.png
Freezebolt Tower IV 500 75 Damage: Very High
Shoots a Piercing projectile which Freezes enemies

Ineffective against Blighted Monsters of the same type
Freezing tower icon.png
Glacial Cage Tower IV 500 60 Deals no Damage
Imprisons Enemies

Ineffective against Blighted Monsters of the same type
IcePrison tower icon.png
Imbuing Tower IV 500 55 Improves the effectiveness of Players in range.
Does not Damage Enemies
BuffPlayer tower icon.png
Lightning Storm Tower IV 500 45 Damage: High
Lightning rapidly strikes around the Tower

Ineffective against Blighted Monsters of the same type
LightningStorm tower icon.png
Meteor Tower IV 500 100 Damage: Very High
Rains Meteors from the sky

Ineffective against Blighted Monsters of the same type
Meteor tower icon.png
Scout Tower IV 500 75 Summons 10 Flying Minions
Minion Damage: High
Minion Life: Low
Can only summon Minions when previous Minions are dead

Ineffective against Blighted Monsters of the same type
FlyingMinion tower icon.png
Seismic Tower Mk I I 100 45 Damage: Low
Repeats 3 times
Always Stuns
Damages and Stuns nearby Enemies

Ineffective against Blighted Monsters of the same type
Physical tower icon.png
Seismic Tower Mk II II 150 45 Repeats 5 times Physical tower icon.png
Seismic Tower Mk III III 300 45 Repeats 7 times Physical tower icon.png
Sentinel Tower IV 500 45 Summons 1 Durable Minion
Minion Damage: Low
Minion Life: High
Can only summon Minions when previous Minions are dead

Ineffective against Blighted Monsters of the same type
TankyMinion tower icon.png
Shock Nova Tower Mk I I 100 20 Damage: Low
Creates Shocked Ground
Casts Shock Nova

Ineffective against Blighted Monsters of the same type
Lightning tower icon.png
Shock Nova Tower Mk II II 150 25 Increased Damage
Increased chance to Shock
Increased Area of Effect
Lightning tower icon.png
Shock Nova Tower Mk III III 300 30 Increased Damage
Increased chance to Shock
Increased Area of Effect
Lightning tower icon.png
Smothering Tower IV 500 55 Weakens Enemies in range
Does not Damage Enemies
Weakining tower icon.png
Stone Gaze Tower IV 500 45 Periodically Petrifies Monsters
Does not Damage Enemies

Ineffective against Blighted Monsters of the same type
Petrification tower icon.png
Summoning Tower Mk I I 100 30 Summons 3 Minions
Minion Damage: Low
Minion Life: Low
Can only summon Minions when previous Minions are dead

Ineffective against Blighted Monsters of the same type
Minion tower icon.png
Summoning Tower Mk II II 150 30 Summons 5 Minions Minion tower icon.png
Summoning Tower Mk III III 300 30 Summons 7 Minions Minion tower icon.png
Temporal Tower IV 500 45 Persistently Slows Monsters
Does not Damage Enemies

Ineffective against Blighted Monsters of the same type
Temporal tower icon.png
Tower Foundation 0 0 A powered base for one of Cassia's towers.

Tower upgrades

Upgrade paths
Tier I Tier II Tier III Upgrades Tier IV Upgrades
Cold tower icon.png
Chilling Tower Mk I
Cold tower icon.png
Chilling Tower Mk II
Cold tower icon.png
Chilling Tower Mk III
Increased Damage

Increased effect of Chill

Affects more Targets

Freezing tower icon.png
Freezebolt Tower
Increased Damage (Very High)

Shoots a Piercing projectile which Freezes enemies

IcePrison tower icon.png
Glacial Cage Tower
Deals no Damage

Imprisons Enemies

Buff tower icon.png
Empowering Tower Mk I
Buff tower icon.png
Empowering Tower Mk II
Buff tower icon.png
Empowering Tower Mk III
Increased effect area
BuffPlayer tower icon.png
Imbuing Tower
Improves the effectiveness of Players in range
Weakining tower icon.png
Smothering Tower
Weakens Enemies in range
Fire tower icon.png
Fireball Tower Mk I
Fire tower icon.png
Fireball Tower Mk II
Fire tower icon.png
Fireball Tower Mk III
Increased effect area

Cast more fireballs (1-3-5)

Flamethrower tower icon.png
Flamethrower Tower
Increased Damage (High)

Casts a stream of Fire

Meteor tower icon.png
Meteor Tower
Increased Damage (Very high)

Rains Meteors from the sky

Physical tower icon.png
Seismic Tower Mk I
Physical tower icon.png
Seismic Tower Mk II
Physical tower icon.png
Seismic Tower Mk III
Repeats more times (3-5-7)
Petrification tower icon.png
Stone Gaze Tower
Periodically Petrifies Monsters

No longer does damage

Temporal tower icon.png
Temporal Tower
Persistently Slows Monsters

No longer does damage

Lightning tower icon.png
Shock Nova Tower Mk I
Lightning tower icon.png
Shock Nova Tower Mk II
Lightning tower icon.png
Shock Nova Tower Mk III
Increased Damage

Increased chance to Shock

Increased Area of Effect

Arcing tower icon.png
Arc Tower
Increased Damage (Medium)

Casts Arc

LightningStorm tower icon.png
Lightning Storm Tower
Increased Damage (High)

Lightning rapidly strikes around the Tower

Minion tower icon.png
Summoning Tower Mk I
Minion tower icon.png
Summoning Tower Mk II
Minion tower icon.png
Summoning Tower Mk III
Summons more minions (3-5-7)
FlyingMinion tower icon.png
Scout Tower
Summons 10 Flying Minions dealing high damage
TankyMinion tower icon.png
Sentinel Tower
Summons one durable minion with a high life pool

Rewards

Completing a blighted map or a blight encounter on a regular map will grant many of the following:

Image Type Typical drops
Blight Cyst treasure.png Random Random assortment of items including armour, weapons and common currency
Blight Cyst oils.png Blight Oils, small chance for rare oils like Silver OilSilver OilStack Size: 10
Oil Tier: 12
Can be combined with other Oils at Cassia to Enchant Rings or Amulets, or to modify Blighted Maps.
Shift click to unstack.
, Golden OilGolden OilStack Size: 10
Oil Tier: 13
Can be combined with other Oils at Cassia to Enchant Rings or Amulets, or to modify Blighted Maps.
Shift click to unstack.
and Blighted Maps
Blight Cyst currency.png Currency Common currency, can contain Chaos OrbChaos OrbStack Size: 10Reforges a rare item with new random modifiersRight click this item then left click a rare item to apply it.
Shift click to unstack.
s
Small chance for Exalted OrbExalted OrbStack Size: 10Augments a rare item with a new random modifierRight click this item then left click a rare item to apply it. Rare items can have up to six random modifiers.s, Exalted ShardExalted ShardStack Size: 20A stack of 20 shards becomes an Exalted Orb.
Shift click to unstack.
s, Ancient ShardAncient ShardStack Size: 20A stack of 20 shards becomes an Ancient Orb.
Shift click to unstack.
s, Divine OrbDivine OrbStack Size: 10Randomises the numeric values of the random modifiers on an itemRight click this item then left click a magic, rare or unique item to apply it.
Shift click to unstack.
s
Blight Sack harbinger.png Harbinger Harbinger's OrbHarbinger's OrbStack Size: 20Reforges a map item as another of a higher tierRight click this item then left click a map to apply it.
Shift click to unstack.
s, Beachhead map, Small chance for Ancient OrbAncient OrbStack Size: 20Reforges a unique item as another of the same item classRight click this item then left click a unique item to apply it.
Shift click to unstack.
s & Exalted ShardExalted ShardStack Size: 20A stack of 20 shards becomes an Exalted Orb.
Shift click to unstack.
s
Blight Cyst jewelry.png Jewelry Rings, Amulets, Jewels, Abyss Jewels and Belts, which may be veiled, fractured, or influenced
Blight Sack divination cards.png Divination Cards 0-4 Stacked DeckStacked DeckStack Size: 10A stack of unknown divination cardsRight click to take a divination card out of the deck.
Shift click to unstack.
s, Random cards
Blight Sack fossils.png Fossils Fossils, Resonators
Blight Sack map fragments.png Map Fragments Scarabs, Sacrifice at DuskSacrifice at DuskItem Quantity: +5%5% increased Quantity of Items found in this AreaThe Vaal shall never fear the setting of our sun.Can be used in a personal Map Device./Dawn/Noon/Midnight,
Offering to the GoddessOffering to the GoddessIt is time for the Goddess to give her final verdict.
Your fate rests in her even hands.
Travel to the Aspirants' Plaza and spend this item to open the Eternal Labyrinth. You must have completed the six different Trials of Ascendancy found in Maps in order to access this area.
, Small chance for valuable map fragments
Blight Sack maps.png Maps Valuable white and yellow maps (T1 to T10). Small chance for red maps (T11+).
Blight Pustle uniques.png Uniques Low level unique items, small chance for unique maps and valuable uniques like Inspired LearningInspired Learning
Crimson Jewel
Radius: SmallWith 4 Notables Allocated in Radius, When you Kill a Rare monster, you gain 1 of its Modifiers for 20 secondsIf you do not learn from a won battle
then you have already lost the war.
Place into an allocated Jewel Socket on the Passive Skill Tree. Right click to remove from the Socket.
.
Blight Cyst armour.png Armour Armour, some of which may be veiled, fractured, 30 quality, or influenced
Blight Cyst weapons.png Weapons Weapons, some of which may be veiled, fractured, 30 quality, or influenced
Blight Sack abyssal.png Abyss Abyss Jewels, Stygian Vise belts
Blight Pustle essences.png Essences All tiers of Essences, small chance for Deafening Essences or Essence of HorrorEssence of HorrorStack Size: 9
Essence Tier: 8
Upgrades a normal item to rare or reforges a rare item, guaranteeing one property

Weapon: 16% chance to gain a Power, Frenzy or Endurance Charge on Kill
Gloves: Socketed Gems have +3.5% Critical Strike Chance
Boots: 5% reduced Elemental Damage Taken while stationary
Body Armour: 15% of Physical Damage from Hits taken as Cold Damage
Helmet: Socketed Gems deal 30% more Elemental Damage
Shield: Chill Nearby Enemies when you Block
Quiver: 4 to 7 Cold Damage per Frenzy Charge
Amulet: 15% increased Effect of Fortify on you
Ring: 4 to 7 Cold Damage per Frenzy Charge
Belt: 5% additional Physical Damage Reduction during any Flask Effect
Right click this item then left click a normal or rare item to apply it.
Shift click to unstack.
Blight Pustle gems.png Gems Skill gems, which may have levels and quality.
Does not contain Anomalous/Divergent/Awakened/Phantasmal gems
Blight Sack prophecy.png Prophecy Random prophecies
Blight Sack talisman.png Talismans Corrupted Talismans
Blight Sack enchanted.png Labyrinth Offering to the GoddessOffering to the GoddessIt is time for the Goddess to give her final verdict.
Your fate rests in her even hands.
Travel to the Aspirants' Plaza and spend this item to open the Eternal Labyrinth. You must have completed the six different Trials of Ascendancy found in Maps in order to access this area.
, Rare armour that has a Labyrinth Enchantment applied
Metamorph Catalysts for rings & amulets, small chance for valuable Fertile CatalystFertile CatalystStack Size: 10Adds quality that enhances Life and Mana modifiers on a ring, amulet or belt
Replaces other quality types
Right click this item then left click a ring, amulet or belt to apply it. Has greater effect on lower-rarity jewellery. The maximum quality is 20%.
Shift click to unstack.
s and Prismatic CatalystPrismatic CatalystStack Size: 10Adds quality that enhances Resistance modifiers on a ring, amulet or belt
Replaces other quality types
Right click this item then left click a ring, amulet or belt to apply it. Has greater effect on lower-rarity jewellery. The maximum quality is 20%.
Shift click to unstack.
s
Delirium Simulacrum SplinterSimulacrum SplinterStack Size: 300Combine 300 Splinters to create a Simulacrum.
Shift click to unstack.
s, Cluster Jewels, Delirium orbs
Breach Blight Sack.png Breach Breach Splinters, and rarely Breachstones or Empowered Breachstones
Perandus Blight Sack.png Perandus Perandus CoinPerandus CoinStack Size: 5000Trade coins to Cadiro Perandus.
Shift click to unstack.
s, can also contain Perandus Scarab
Legion Legion Splinters, Incubators
Scarabs Blight Sack.png Scarab Scarabs


See Also

Version history

Version Changes
3.14.0
  • Spawn chance in map has changed to 8%[3]
3.12.0
  • Arc Towers now cast 74% faster.
  • Shock Nova Towers now cast 50% faster.
  • Chilling Towers now have 50% more Chill effect, and have a cooldown of 4 seconds (from 7).
  • Seismic Towers now have 50% more skill effect duration and have a cooldown of 4 seconds (from 7).
  • Minion Towers now wait 3 seconds before resummoning their dead minions (from 8).
  • Freezebolt Towers now cast twice as fast and have half their previous cooldown. They now fire an additional projectile.
  • Stone Gaze Towers now reduce action speed by 20% (from 15%) and have slight reduced cooldown.
  • Scouts from Scout Towers now have 38% more Attack Speed and deal 50% more damage.
3.8.0
  • Introduced to the game.

References

  1. Version 3.9.0 patch notes cite 10%, followed by Version 3.14.0 patch notes citing a 20% reduction.
  2. MapBlightLeagueCrafted_MapBlightLeagueCrafted_
    Unique
    Area contains an additional Blight Encounter
    League 31 (Hidden)
  3. Chris (April 9, 2021). "Path of Exile: Ultimatum Content Reveal". Path of Exile Youtube Channel. Retrieved April 9, 2021.
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