With the release of Path of Exile 2's 0.5 update, Return of the Ancients, Delirium has become much more than a random endgame encounter. The mechanic now has its own progression path, exclusive rewards, Atlas support, and a dedicated storyline that leads all the way to a major boss encounter POE 2 Orbs.

If you've been wondering whether Delirium is worth farming in Patch 0.5, the answer is yes. Here's everything you need to know to get started and make the most of it.

What Is Delirium in PoE 2?
Delirium is an endgame mechanic that covers an area in a mysterious fog, dramatically increasing monster density, difficulty, and rewards.

As you move deeper into the encounter, enemies become stronger, gain additional abilities, and take longer to kill. In exchange, you'll earn better loot, more experience, and access to Delirium-exclusive rewards.

The mechanic heavily rewards fast-clearing builds and efficient movement. The longer you can survive and keep pushing forward, the greater the payoff.

Unlike earlier versions of the system, Patch 0.5 makes Delirium much easier to access, allowing players to build entire farming strategies around it.

How to Start Delirium
Most players will first encounter Delirium through Delirium Mirrors found in endgame areas.

These mirrors are easy to spot thanks to their distinctive shattered-glass appearance. Walking through one immediately transforms the map and fills it with fog, beginning the encounter.

As you progress, you'll meet Elder Madox, a character connected to Tangmazu, the mysterious Raven Trickster. Following this storyline eventually unlocks deeper Delirium content and leads toward one of the update's major endgame challenges.

Understanding the Delirium Bar
One of the biggest mistakes new players make is ignoring the Delirium UI.

The bar at the top of the screen serves as both a guide and a timer. It helps you track encounter progress and points you toward upcoming Delirium events.

Special icons appear along the bar, indicating themed encounters and reward opportunities ahead. Following these markers helps you stay on the optimal route instead of wasting time wandering through the map.

The fog itself can also help with navigation. If you pay attention to its movement, you'll often notice it flowing in the direction of your next objective.

How to Survive Delirium
Delirium isn't dangerous because of a single boss or monster. The real threat comes from constant pressure.

While inside the fog, players accumulate stacking damage effects that become increasingly deadly if ignored. Standing in dangerous areas for too long can quickly overwhelm even well-geared characters.

A simple trick is to avoid fighting in the thickest parts of the fog whenever possible. Keep moving, reposition often, and step onto safe ground when stacks begin to build up.

Defensively, several stats become especially valuable:
Chaos Resistance
Physical Damage Mitigation
Life or Energy Shield Recovery
Leech and Regeneration
Reliable Mobility Skills

The more time you spend moving instead of standing still, the easier Delirium becomes.

Delirium Rewards in Patch 0.5
One of the biggest reasons players are farming Delirium this league is the reward system.

The mechanic introduces two major currencies:

1. Liquid Emotions
Liquid Emotions are used for powerful crafting and item enhancement options. They can improve Waystones, Amulets, and other endgame items, making them valuable for character progression.

Higher-tier versions can also interact with jewels and advanced crafting systems, giving players more control over item customization.

2. Simulacrum Splinters
Simulacrum Splinters are collected throughout Delirium encounters and eventually combine into full Simulacrums.

These unlock special wave-based challenges that offer some of the best rewards available through the mechanic.

For many players, farming Simulacrums becomes the primary reason to invest heavily into Delirium.

Delirium Chains and Simulacrums
Patch 0.5 introduces a more structured progression system for Delirium.

Rather than running isolated encounters, players can chain Delirium maps together. Each step increases both difficulty and rewards, creating a natural progression path that eventually leads to Simulacrum content.

The deeper you go, the more dangerous enemies become, but the rewards scale accordingly.

Players with strong builds and efficient mapping strategies can generate impressive amounts of loot and experience through these chains.

Atlas Passive Tree Changes
Delirium received significant support on the revamped Atlas Passive Tree.

New passives allow players to increase encounter frequency, improve rewards, and customize how Delirium appears across their maps.

This gives much more control than before. Instead of hoping for profitable encounters, you can actively invest into Delirium and turn it into a dedicated farming strategy.

For players who enjoy specializing in a single mechanic, the new Atlas options make Delirium one of the most attractive choices in the current endgame.

Double-Anointed Amulets
One of the most exciting additions tied to Delirium is the introduction of double-anointed amulets.

These powerful items can provide multiple passive-style bonuses without requiring additional passive tree investment.

For endgame characters focused on min-maxing, double-anointed amulets can offer significant power gains and open up new build possibilities.

Combined with Delirium's crafting systems, they make the mechanic a valuable source of character upgrades beyond simple currency farming.

Best Builds for Delirium
Clear speed is king. Builds that can deal damage while moving tend to perform far better than slower, stationary playstyles.

Some of the strongest options include:
Fast ranged builds with strong area damage
Minion builds that continue fighting while you reposition
Damage-over-time setups
Mobile melee builds with large area coverage

Pure single-target builds often struggle because Delirium constantly throws large groups of enemies at the player.

The ability to clear quickly while staying mobile is usually more important than raw boss damage.

Is Delirium Worth Farming?
For many players, Delirium is now one of the most rewarding mechanics in Path of Exile 2.

Guaranteed access, improved Atlas support, valuable crafting materials, Simulacrum progression, and unique item rewards give it a much stronger identity than before.

More importantly, the mechanic now feels like a complete endgame system rather than a random bonus encounter Exalted Orb.

If you enjoy fast-paced mapping, scaling risk for bigger rewards, and constantly testing the limits of your build, Delirium is easily one of the best activities to focus on in Patch 0.5.