Path of Exile 2 Primary Calamity Fragment

Primary Calamity Fragment is a pinnacle key item introduced in Path of Exile 2 Patch 0.3.0c, used to access the Uber version of the Arbiter of Ash encounter via the Burning Monolith. It bears a pictograph of a lunar eclipse made crimson by crystallised Corruption, symbolising the elevated difficulty and reward of the Uber fight.

Can be placed in a door in The Burning Monolith to initiate the Uber Arbiter of Ash encounter

Path of Exile 2 Primary Calamity Fragment Features

• Item Type: Pinnacle Key – Calamity Fragment

• Function: Unlocks the Uber version of the Arbiter of Ash fight at the Burning Monolith

• Usable on: Burning Monolith

• Drop Level: 1  | Class: Pinnacle Keys

How to Get Primary Calamity Fragment in Path of Exile 2

• Dropped by Citadel bosses (Geonor, Jamanra, Doryani) under maximum difficulty

• Requires 10 points allocated on the Atlas boss tree

• Replaces Crisis Fragment drops when conditions are met

Primary Calamity Fragment Usage & Strategy

To access the Uber version of the Arbiter of Ash, players must:

1. Allocate 10 Atlas boss tree points – Any combination of points will suffice

2. Defeat Citadel bosses – In their hardest forms with enhanced modifiers

3. Use the Tertiary, Secondary, Primary Calamity Fragment at the Burning Monolith

Uber Arbiter of Ash Encounter Overview

The Uber version of the Arbiter of Ash features intensified mechanics and is suspected of having loot biasing. If players die during the fight, the instance is downgraded to the standard version, allowing retry attempts.

Combat Phases

• Pre-Damage Phase: Basic Claw Fireball

• Phase 1: Bullet Hell, Flameblast Hallways, Seed mechanics

• Phase 2: Sword Slam, Beam, Chasm Slash, Flame Seed variants

Notable Drops from Uber Arbiter of Ash

• Solus Ipse Grand Visage – Mana boost, light radius, dual Lineage support sockets

• Morior Invictus Grand Regalia – High defenses, rune sockets, random modifiers

• Sine Aequo Grand Manchettes – Skill speed, immobilisation mechanics

• Ab Aeterno Grand Cuisses – Movement speed, dodge roll mechanics

• Sacred Flame Shrine Sceptre – Purity of Fire aura, ally buffs

• Prism of Belief Diamond (Jewel) – Skill level boost, corrupted

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