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Path of Exile Blight League Encounters Guide (PoE Blight 3.8)

PoE 3.8 Blight league Mechanics Explained

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Path of Exile Blight is fully on the way, bringing fresh new challenges and unique tower defense game mechanics. The gleaming selling point of this league is Blight, a mind-controlling essence that entices streams of corrupted monsters to mindlessly follow root paths. To keep these corrupted monsters at bay, and to aid Sister Cassia in protecting Wraeclast from the evil influence, Exiles will need to build strategic towers alongside their chosen abilities.

The new league mechanic can be overwhelming, especially for new players. You’ll need to understand the different towers options, learn how to manage the area when multiple paths form and identify corrupted monsters weaknesses. Our guide below will walk you through each stage of PoE 3.8 Blight Mechanics.

Where to Find Blight Encounters?

You’ll encounter Sister Cassia in the wild as early as Act 1, She’ll be obnoxiously singing while standing next to a large Purification Pump. Interacting with the pump will begin the Blight encounter, agitating the Blight’s fungal growth and spawning waves of monsters along multiple roots. At the end of each root path, will be a portal in which the corrupted monsters spawn from. As the encounter plays out, many new roots can be formed.

PoE 3.8 Blight Encounters
Path of Exile 3.8 Blight Encounters

How to complete Blight Encounters?

Short and Sweet, defeat all the corrupted monsters and prevent them from attacking the purification pump. Easy enough right? Definitely not! Let’s dive into the little nuances that make the PoE Blight League Mechanics special.

Once you’ve activated the purification pump, the fungal growth will spawn roots, and players will be granted a brief amount of time to strategically set up their defense. Scattered along each path, indicators will pop-up to show where defensive towers can be placed. It’s best to use this short time period to plan ahead of time your tower placements. You’ll have a limited amount of resource at the start of the encounter to build towers with. As the encounter draws out you’ll earn more tower building resources by killing the corrupted monsters.

Now we have a crucial choice to make, which type of tower to build? Early on it’s best to utilize Chilling Towers right near the portal entrances, this will slow the monsters down instantly and allow you to slowly hack away at them. As your build progressively becomes stronger and you’re competent at clearing mobs effectively, you can now start to mix the towers up. Let’s take a look at all the available Path of Exile Blight Towers and when to use them.

PoE 3.8 Blight Towers

In total there are six towers that you can select from. Early game you will not discover all options but they will open up as you progress through the acts. Each tower can be upgraded four times, increasing in strength and effectiveness. Once a tower reaches rank four, you’ll be issued a choice between two paths to upgrade.

Chilling Tower

As the name implies, the Chilling Tower chills nearby enemies. This tower is impressive for buying time to deal with other paths. If your build allows, the Chilling Tower can also boost your damage from items and skills used. I personally use this tower every time an encounter contains a cross-section between paths. Placing the tower right on the V section of the root to cover both path areas.

Path of Exile Blight Tower Defence Tatics
Path of Exile Blight Tower Defense Tactics

Rank I
Chills and damages nearby enemies

Rank II

  • Increased damage
  • Increased effect of Chill
  • Affects more Targets

Rank III

  • Increased damage
  • Increased effect of Chill
  • Affects more Targets

Rank IV

Glacial Cage: Imprisons enemies similarly to Frost Wall. Superb crowd control upgrade especially against harder boss encounters.
Freezebolt: Fires a long-range ice bolt that deals massive damage and provides a great chance to freeze. Freezebolt additionally pierces through targets. Perfect hybrid between damage and defense, best used across long strands of roots.


Fireball Tower

Your long-range damage source. Fireball Tower will release fireballs at your enemies, the number of projectiles increases as you level up the structure. Placing a Fireball Tower near the Purification Pump and a Chilling Tower further up the Blight Path will increase the overall damage output.

Rank I
Casts a single Fireball

Rank II
Cast 3 Fireballs

Rank III
Cast 5 Fireballs

Rank IV

Meteor Tower: Meteors fall from the sky damaging enemies in a considerable area. Best used in more chaotic root setups.
Flamethrower Tower: Casts a stream of Fire. Best used on long, straight roots.


Shock Nova Tower

Casting a small shockwave around the tower which increases with each level. Shock Nova Tower will additionally increase your overall damage output because not only does it cast a shock ring but leaves behind shocked ground.

Rank I

  • Creates Shocked Ground
  • Cast Shock Nova

Rank II

  • Increased damage
  • Increased chance to Shock
  • Increased Area of Effect

Rank III

  • Increased damage
  • Increased chance to Shock
  • Increased Area of Effect

Rank IV

Lightning Storm Tower: Lightning rapidly strikes around the Tower. Perfect for choke points and in conjunction with Chilling Tower.
Arc Tower: Casts Arc. Great for spreading across multiples lanes and bends.


Seismic Tower

Guaranteed Stuns! Seismic tower sends out a series of shockwaves that cause low damage but stuns the enemy. Super effective in high traffic areas and pairs well with all other damaging turrets.

Rank I

  • Releases 3 shockwaves
  • Damages and Stuns nearby Enemies

Rank II
Repeats 5 times

Rank III
Repeats 7 times

Rank IV

Temporal Tower: Applies a debuff that continuously slows enemies. The skill does no damage, good for areas where paths meet. Not an upgrade choice I’d personally make unless in Blight influenced maps.
Stone Gaze Tower: Periodically Petrifies Monsters just like the Unique helmet Gorgon’s Gaze. Like Temporal Tower, Stone Gaze deals no damage to monsters.


Summoning Tower

Assemble an army to obstruct the corrupted monsters by using the Summoning Tower. Spawning friendly minions that deal damage gaining in strength and numbers as you level.

Rank I

  • Summons 3 Minions
  • Can only Summon more minions once the previous is dead

Rank II
Summons 5 Minions

Rank III
Summons 7 Minions

Rank IV

Scout Tower: Summons 10 Flying Minions. Dealing high damage, Scout Tower has a high aggro range. Utilize near your Pump to deal high damage fast. It’s worth noting that these minions cannot block enemies movements.
Sentinel Tower: Summons 1 Durable Minion. Only once this minion dies will another spawn. Amazing at soaking up damage and blocking enemies from progressing towards the pump.


Empowering Tower

Tower enhancing boost. The Empowering Tower from rank one to three will cast an aura that boosts the effectiveness of all the towers within its radius.

Rank I

  • Improves the effectiveness of other Towers
  • Does not damage Enemies

Rank II

  • Improves the effectiveness of other Towers
  • Range increased by 15

Rank III

  • Improves the effectiveness of other Towers
  • Range increased by 10

Rank IV

Imbuing Tower: Improves the effectiveness of Players in range.
Smothering Tower: Weakens Enemies in Range


Keep an eye on the progress section on the bottom of your screen. Each circle represents how many paths will spawn, and each circle may contain a symbol. If a symbol is shown matching one of the Six possible towers, this lets you know that monsters on this path resist that element.

Path of Exile Blight Monsters Resistance
Path of Exile Blight Monsters Resistance

Once you’ve successfully completed a Blight encounter you will receive a “pot of gold at the end of a rainbow.” Each Fungal root path will provide a reward for you to collect. The icons above each reward indicate what type of treasure you can expect. These icons are very much the same as the previous league Legion’s Icons with a few new ones thrown into the mix. One of which indicate the PoE 3.8 Blight Oils, let’s take a look at what these are and how to use them.

Blight Oils

Oils are the foundations of Poe Blight League, stackable currency that’s used to empower Blight maps, rings, amulets and special Blight uniques. Much like essences, you can vendor three Oils for one vial of oil in the next tier. Anointing enchantments can add a range of extraordinary passives to your items varying between the combination of Oils used.

There are 12 total oils introduced into Path of Exile Blight, each one brings their own unique characteristics to items used. To see what each Oil can create, check out Blight oil passives recipes spreadsheet created by Reddit user theangryfurlong.

Modifying Rings will grant you influential modifiers that affect Towers in Blight encounters. Just like Breach rings, anointing rings can provide bonuses like extra slows or status ailments to Blight Monsters.

PoE Anoint Item - Blight Expansion 3.8
Path of Exile Anoint Items

PoE Blighted Maps

Now, this is where things get remarkably interesting. Once you have battled your way through all the acts, you’ll subsequently move onto the Atlas and map farming. You’ll still encounter Blight infections in traditional maps on the atlas, however, you’ll equally come across Blight influenced map mods. These maps will contain larger fungal roots, splitting off into multiple paths (Far more than usual.) Completing the Blight influenced maps will reward you with vastly more loot and oils. If your build is not quite ready to deal with the massive mobs, it’s best to attempt Blight influenced maps with minimal map mods rolled as all mods will affect corrupted Blight monsters.

Depending on your build, now would be the time that you best utilize strategic defensive planning to your advantage. If you’re lacking in crowd control, upgrade towers that can lock enemies in place like Glacial Cage. Blight encounters are the fundamental foundation on which this expansion was produced for, so if you’re looking to get your hands on tons of loot it’s best to excel in this area.

Recommended PoE Blight build

Summoners! Minions have been one of GGG’s main focus going into 3.8, and now they are everywhere! However, playing as a necromancer in PoE Blight makes perfect sense for a beginner looking to maximize the new Blight mechanics. Roaming around with an army allows you to have more moments to your self where you can better decide which tower to build, where to build them and adjust to new roots. If you’re looking for a PoE Blight Starter Build check out the link below.

Path of Exile 3.8 Blight Starter Builds

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