In Path of Exile 2, rare and powerful loot is often locked behind special mechanisms—bosses, rituals, and keys that open the gates to high-tier treasures. One of the most coveted and mysterious of these is The Arbiter's Reliquary Key, a rare item that unlocks access to a vault of exclusive cosmetics, uniques, and divine relics. Whether you're a collector, a build optimizer, or simply hunting for endgame loot, obtaining this key is a critical step toward accessing some of the game's most exclusive rewards.

In this article, we'll dive deep into how to get The Arbiter's Reliquary Key in Path of Exile 2, including farming strategies, drop locations, boss mechanics, and how to maximize your chances of acquiring this elusive item.

What is The Arbiter's Reliquary Key?

The Arbiter's Reliquary Key is a rare consumable item in Path of Exile 2 that acts as a portal to The Arbiter's Reliquary, a specialized loot room tied to late-game or high-challenge content. Similar to how the Offering to the Goddess grants access to the Eternal Labyrinth in PoE1, or how the Voidborn Reliquary Key works in League mechanics, this key gives players the opportunity to open a special chest or shrine that yields high-tier items—often cosmetics or curated uniques from developer or supporter-designed lists.

The Arbiter's Reliquary itself is typically a one-time instance that disappears after use, making each key extremely valuable.

How to Obtain The Arbiter's Reliquary Key

1. Endgame Boss Farming

The most reliable source of The Arbiter's Reliquary Key is endgame boss encounters. These bosses include campaign-ending act bosses, apex arena challenges, and league-specific endgame encounters such as:

The Plague Cathedral Bosses

Godbound Sentinels in the Divine Crucible

The Herald of Decay in high-tier Fungal Chambers

The Arbiter of Judgement himself, found through unique map devices or league mechanics

Each of these bosses has a low but increasing chance to drop the key as you farm them at higher difficulty tiers (especially when modifiers like “Corrupted,” “Empowered,” or “Tormented” are present).

Strategy:

Focus your Atlas progression around boss-loot nodes.

Farm unique boss maps like Judgement Crypts or Sanctified Vaults.

Use scarabs or catalysts to increase the “Currency” and “Unique” item drop modifiers.

2. Divine Reliquary Events

Occasionally, league mechanics or events will include Divine Reliquary Chests that have a small chance to contain the Arbiter's Reliquary Key.

These events may include:

League-specific mechanics like Expedition, Incursion, or Delirium that include reliquary nodes.

League Altars or Shrines that randomly grant rare currency or key rewards.

Community Challenges where players unlock global rewards through communal goals.

Stay up to date with patch notes and league updates, as these mechanics often change per patch.

Drop Rates and Rarity

While the exact drop rate for The Arbiter's Reliquary Key isn't officially published, data-mined estimates and community feedback suggest a drop chance of less than 1% on standard bosses, rising to 3–5% on high-difficulty unique encounters or bosses buffed by multiple modifiers.

You can improve your odds by:

Increasing item quantity and rarity through map modifiers

Using Fortune Favors the Brave, Ambush, or Elder/Shaper influenced map mods

Running Corrupted maps and using sextants that add additional bosses or reliquary chests

Trading for the Key

Because of its rarity, The Arbiter's Reliquary Key is often listed for trade in the player economy. The average price can fluctuate based on league scarcity, but players can expect to pay:

100–250 POE 2 Chaos Orbs, or

5–10 Divine Orbs, depending on the economy and league cycle

You can search for current listings on community trade sites or in-game through NPCs like Tujen, the Haggler (if he appears in the league you're playing).

What's Inside The Arbiter's Reliquary?

The Reliquary Chest opened with this key has a curated loot table, with chances to receive:

Exclusive Unique Items: Items with powerful affixes or supporter-created effects

Rare Cosmetics: Armor skins, alternate skill effects, or weapon glows

Divine Orbs and Mythic Crafting Materials: Used for high-end gear creation

Legacy Items (in some leagues): Items that were retired or rebalanced in prior versions

These rewards are designed to feel legendary and meaningful, making each use of the key exciting and valuable.

Tips for Farming Reliquary Keys Efficiently

Optimize Map Rotations

Use maps that include double boss encounters or have high monster density. Prioritize maps that synergize with your build's speed-clearing ability.

Craft for Quantity & Rarity

Always aim for at least 80–100% increased item quantity and 60%+ rarity in your maps to increase the odds of key drops.

Party Up with a Magic Finder

Join or form groups with a dedicated MF player. Reliquary keys can drop for party members, making your runs more efficient.

Check Daily League Rotations

Some leagues will rotate mechanics that favor reliquary drops—e.g., extra strongboxes, expedition nodes, or rogue exiles with increased currency drops.

Final Thoughts

The Arbiter's Reliquary Key represents one of the most prestigious and mysterious items in Path of Exile 2. Though rare, it's absolutely worth the effort for players seeking exclusive loot, powerful uniques, or a shot at cosmetics not obtainable elsewhere in the game. Whether you're farming bosses, engaging in endgame league mechanics, or trading with other exiles, understanding how to reliably acquire this key gives you a significant edge in the race for ultimate power.

As with all things in Wraeclast, persistence and strategy are key. Plan your grind, optimize your maps, and chase the Reliquary—you never know when your next loot drop might be a game-changer.