Updated PoE 3.25 Settlers of Kalguur Incursion Full Upgrade List

The Incursion mechanic is one of the more profitable contents during the early mapping stage as you try to uncover more branches and gain drops. Raiding the Temple of Atzoatl will provide us with various loot depending on which rooms we upgrade to their max tier. Players are given multiple chances to enhance each chamber or to change their current layout. If you want to maximize your profit running Incursions, this guide will help you determine the best rooms to upgrade. 

PoE Incursion Overview

Alva sends you back in time to reshape the Temple of Atzoatl before you plunder its treasures. The layout of the pyramid will change depending on your actions and choices. You alter the chambers and their tier depending on which Architect you kill. Alva will give you three chances to go back on every map to upgrade and change three different chambers each time.

All Temple of Atzoatl Upgrade List

Each chamber can be upgraded to Tier III, and their stats and difficulty increase with each level. The more complex they are, the better EXP and rewards you get. Here are all the potential rooms in the Temple of Atzoatl and their drops:

Strongbox Chamber (Strongboxes)

• Tier I: Strongbox Chambers (2 Strongboxes)
• Tier II: Hall of Locks (4 Strongboxes)
• Tier III: Court of Sealed Death (6 Strongboxes)

Sparring Room (Weapons Chests)

• Tier I: Sparring Room
• Tier II: Arena of Valour
• Tier III: Hall of Champions

Storage Room (Items)

• Tier I: Storage Room (3 Chests)
• Tier II: Warehouses (3 Chests)
• Tier III: Museum of Artifacts (3 League Specific Chests)

Surveyor’s Study (Maps)

• Tier I: Surveyor’s Study (1 Map Chest)
• Tier II: Office of Cartography (2 Map Chest)
• Tier III: Atlas of Worlds (3 Map Chests)

Jeweller’s Workshop (Jewelry)

• Tier I: Jejweller’s Workshop (3 Jeweller’s Boxes)
• Tier II: Jewellery Forge (5 Jeweller’s Boxes)
• Tier III: Glittering Halls (7 Jeweller’s Boxes)

Vault (Currency)

• Tier I: Vault (2 Currency Chests)
• Tier II: Treasury (4 Currency Chests)
• Tier III: Wealth of the Vaal (6 Currency Chests)

Armourer’s Workshop (Armour)

• Tier I: Armourer’s Workshop (2 Armour Chests)
• Tier II: Armoury (4 Armour Chests)
• Tier III: Chamber of Iron (6 Armour Chests)

Gemcutter’s Workshop (Gems)

• Tier I: Gemcutter’s Workshop (1 Gem Chest)
• Tier II: Department of Thaumaturgy (2 Gem Chests)
• Tier III: Doryani’s Institute (3 Gem Chests)

Corruption Chamber (Corrupting)

• Tier I: Corruption Chamber (-6 Max Resists)
• Tier II: Catalyst of Corruption (-8 Max Resists)
• Tier III: Locus of Corruption (-10 Max Resists)

Sacrificial Chamber (Unique Swap)

• Tier I: Sacrificial Chamber (Random Unique)
• Tier II: Hall of Offerings (League Specific Unique)
• Tier III: Apex of Ascension (Increased Base Stats)

Splinter Research Lab (Breach Events)

• Tier I: Splinter Research Lab (2 Breach Hands)
• Tier II: Breach Containment Chamber (2 Breach Hands + 1 Breach)
• Tier III: House of the Others (2 Breach Hands + 3 Breaches)

Lightning Workshop (Lightning Upgrade to Omnitect)

• Tier I: Lightning Workshop
• Tier II: Omnitect Reactor Plant
• Tier III: Conduit of Lightning

Pools of Restoration (Mobs HP Regen)

• Tier I: Pools of Restoration (4% HP Regen)
• Tier II: Sanctum of Vitality (6% HP Regen)
• Tier III: Sanctum of Immortality (8% HP Regen)

Hatchery (Omnitect spawns Minions)

• Tier I: Hatchery
• Tier II: Automaton Labs
• Tier III: Hybridisation Chamber

Guardhouse (Increased Pack Size)

• Tier I: Guardhouse
• Tier II: Barracks
• Tier III: Hall of War

Trap Workshop (Traps throughout the Temple)

• Tier I: Trap Workshop
• Tier II: Temple Defense Workshop
• Tier III: Defense Research Lab

Poison Garden (Poisonous Plants throughout the Temple)

• Tier I: Poison Garden
• Tier II: Cultivar Chamber
• Tier III: Toxic Grove

Workshop (Life increase for Bosses and Quantity increase for Mobs in the Temple)

• Tier I: Workshop
• Tier II: Engineering Department
• Tier III: Factory

Tempest Generator (Tempest exists in the Temple)

• Tier I: Tempest Generator
• Tier II: Hurricane Engine
• Tier III: Storm of Corruption

Royal Meeting Room (Atziri appears)

• Tier I: Royal Meeting Room
• Tier II: Hall of Lords
• Tier III: Throne of Atziri

Torment Cells (Torment Spirits Posses Bosses)

• Tier I: Torment Cells (3 Tormented Spirits)
• Tier II: Torture Cages (5 Tormented Spirits)
• Tier III: Sadist’s Den (7 Tormented Spirits)

Explosives Room (Gain Access to Flashpowder Kegs)

• Tier I: Explosives Room (1 Flashpowder Keg)
• Tier II: Demolition Lab (2 Flashpowder Keg)
• Tier III: Shrine of Unmaking (3 Flashpowder Keg)

Shrine of Empowerment (Powerup Rooms)

• Tier I: Shrine of Empowerment
• Tier II: Sanctum of Unity
• Tier III: Temple Nexus

Hall of Mettle (Timeless Monolith appears in the Temple)

• Tier I: Hall of Mettle (Timeless Monolith)
• Tier II: Hall of Heroes (War Hoards)
• Tier III: Hall of Legends (Generals)

How to Upgrade Rooms to Tier III

Alva will only give you three attempts before you must plunder the whole Temple, so you need to focus your efforts on changing rooms you want to enhance. Whenever Alva appears on a map, she’ll send you to a random chamber. However, you cannot change or upgrade the same room on the same map. If you want to maximize your chances of altering a specific room, skip instances that go to chambers you don’t like and move on to the following map. While this results in fewer rooms to raid, you get better rewards for doing this.