� Path of Exile 2 – Pinnacle Bosses¶

Boss	Type / Context	Location / Access	Main Mechanics
The Arbiter of Ash	Atlas – Fire / Elemental	Access via Crisis Fragments (Iron, Copper, Stone Citadels)	Two phases: physical and fire damage, burning ground zones, elemental orbs that change terrain type, flame bombs with safe zones.
Xesht, We That Are One	Breach	Use a Breachstone at the Realmgate	Arena fight with enemy waves, the boss merges with its clones, heavy physical/chaos damage, corrupted ground zones.
Olroth, Origin of Fall	Expedition	Found in a Kalguuran Tomb (Expedition Logbook, area ≥ 79)	Fire explosions, totems empowering the boss, summons Kalguuran spirits, destroys part of the arena during final phase.
The King in the Mists	Ritual	Use the invitation “An Audience with the King” at the Realmgate	Multi-phase fight with ritual ghost summons, shadow zones that deal damage, spirit projectiles, frequent teleporting and cloning.
Omniphobia, Fear Manifest	Delirium / Simulacrum	High waves in the Simulacrum	Massive melee boss. Ground slams, fear projectiles, creates “Delirium debuff” stacks.
Kosis, The Revelation	Delirium / Simulacrum	Final waves of the Simulacrum	Chaos and physical damage, rotating beams, energy explosions, self-heals during add phases.
Zarokh, The Temporal	Trials of Sekhemas	Final room of the 4^th floor Trial	Boomerang-style projectiles, temporal portals, orbs passing through portals, “time trial” minigame (collect hourglasses to avoid instant death).
The Trialmaster	Trial of Chaos	After the 10^th Trial, using the three “Fate Keys”	Manipulates time (stops or slows it), powerful melee attacks, shadow explosions, chaos projectiles. Positioning is key.
Eshmir, the Endless Warden	Atlas – Water / Frost	Invitation “Echoes of the Deep”	Creates waves and geysers, manipulates water level, freezes the player, summons adds near phase transitions.
Nehil, Voice of the Abyss	Atlas – Shadow / Chaos	Invitation “Whisper from the Deep”	Darkness and shadow mechanics, limited vision zones, clones reflecting damage, frequent teleports.
Ahrûn, the Dawnseeker	Atlas – Light / Lightning	Invitation “Storm’s Summit”	Lightning storm mechanics: thunder strikes, conductive zones, bouncing projectiles, invulnerable channel phase.
Erebrix, the Plague Herald	Atlas – Poison / Decay	Invitation “Garden of Rot”	Spreads toxic spores, creates rot zones, summons insect swarms that explode on death. Requires constant movement.

� Notes: - Atlas Invitations (“Echoes of the Deep”, “Storm’s Summit”, etc.) drop from endgame content or are crafted from Crisis Fragments.
- Some Pinnacle Bosses have Uber versions with new patterns and faster attack sequences (e.g. The Arbiter of Ash – Uber version).
- All Pinnacle encounters are endgame-tier (area level 83+), requiring a fully developed build.