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Dream Abyss is part of the When Dreams Remain Unfinished event in Zenless Zone Zero (ZZZ) 2.3. See all Dream Abyss combat and quest guides, recommended companions, and all the rewards here!
| When Dreams Remain Unfinished Guides | ||
|---|---|---|
Event Guide |
Light Nap Day 1 Guide |
Deep Sleep Day 2 Guide |
Dream Abyss Day 3 Guide |
Simulation Challenge |
Companion Database |
| Dream Investigation - Dream Abyss | ||
|---|---|---|
| 1 | The Final Dream Story | Dream Abyss Battle (I) Combat |
| 2 | Dream Abyss Battle (II) Combat | Farewell Story |
| 3 | Dream Abyss Battle (III) Combat | Dream Abyss Battle (IV) Combat |
| 4 | Unfinished Dreams Story | |
| 5 | Dream Abyss Battle: Troublemaker Combat | |
Click on the links to jump to a guide!
| Dream Description | Buff effects are crucial for Biological allies. Once a Bulky Enforcer receives a buff, its skill are enhanced. Use the Dreaming Hymnist to grant buffs to the Bulky Enforcer. |
|---|---|
| Recommended | |
| Companion |
|
In the first battle stage, you will be utilizing Organic companions, and buffing your allies is the key to defeating the Ethereals.
Use the Dreaming Hymnist's skill, Buff, to enhance the damage dealt by both allies and itself.
| Dream Description | Dullahan places marks on your allies, so try taking it out first with the Bulky Enforcer. At the same time, using Dreaming Hymnist to keep buffing the Bulky Enforcer will give you a huge advantage. |
|---|---|
| Recommended | |
| Companion |
|
In the second battle stage, defeating the Dullahan is vital as it marks your allies. Focus on using buffs for the Bulky Enforcer so it can swiftly take out the Dullahan.
| Dream Description | The enemy Frenzied Maniac deals heavy DMG, posing a serious threat. Prioritize eliminating it with your DMG-dealing allies. |
|---|---|
| Recommended | |
| Companion |
|
In the third battle stage, both the Flame Dreamer and the Dreaming Hymnist need to enhance the Bulky Enforcer's attacks. When it’s the Bulky Enforcer's turn, prioritize using attack skills on the Frenzied Maniac before it can eliminate your allies.
| Dream Description | The enemy Thracian has AoE burst skills, so you'll need to dispel marks from your squad quickly. Alternatively, use Rampant Brute's AoE DMG skill to take out the enemy Tyrfing first, preventing it from adding marks for the Thracian. |
|---|---|
| Recommended | |
| Companion |
|
In the fourth battle stage, you will face the Thracian alongside multiple Tyrfings. To successfully complete this stage, focus on building up the buffs on Rampant Brute.
When it is Rampant Brute's turn, activate the Burst skill to inflict debuffs on all enemies while dealing area-of-effect damage.
| Dream Description | At the heart of Yidhari's nightmare lies the strongest foe in this dream. Keep your allies buffed, draw on the experience you've gained, and shatter this nightmare once and for all! |
|---|---|
| Recommended | |
| Companion |
|
You are now facing the strongest enemy, Dead End Butcher, along with its Ethereal allies. First, use the Buff skills of both the Flame Dreamer and Dreaming Hymnist, enhancing your allies' damage.
Next, have the Bulky Enforcer activate its Burst skill against the enemies. When it’s the Rampant Brute's turn, use its AoE Burst skill to deal massive damage to the clustered enemies while also debuffing them.
| Quest Walkthrough | |
|---|---|
| 1 | ![]() As the team rescues Yidhari inside her dream, they are teleported to the Darkwater Research Center. Meet up with Yidhari and explain the situation to her. |
| 2 | ![]() Next, the team will investigate and explore the Darkwater Research Center. Approach Lucia, as there is some equipment left behind. |
| Quest Walkthrough | |
|---|---|
| 1 | ![]() After the battle, talk to the team to discuss the escape route. Yidhari recalls her memories with her parents and the Darkwater Research Center. |
| 2 | ![]() Search the area for other clues left behind by Yidhari's parents. Approach the Broken Communication Device to aid Yidhari as she recalls her memories. |
| Quest Walkthrough | |
|---|---|
| 1 | ![]() The team needs to reach the exit of Yidhari's Dream by following the quest marker that leads there. |
| 2 | ![]() Yidhari will revisit her past in the correct order. First, she must visit Grandpa Gu to ask for a birthday present for her mom. |
| 3 | ![]() Grandpa Gu will help her board the ship and give her a ticket to deliver the present to her mom in person. |
| 4 | ![]() Through this journey, Yidhari will uncover the truth and the real story behind her parents' research. |
| 5 | ![]() After the Hollow Corruption reaches the Darkwater Research Center, Yidhari's parents decide to part ways to ensure her safety. |
| 6 | ![]() When Yidhari reaches the final memory, she meets her mom near the exit. |
| 7 | ![]() To complete her journey, Yidhari must exit her memories and interact with the fissure to confront the Dead End Butcher. |
| Objective | Rewards |
|---|---|
| Complete Dream Abyss Battle (I) |
|
| Complete Dream Abyss Battle (II) |
|
| Complete Dream Abyss Battle (III) |
|
| Complete Dream Abyss Battle (IV) |
|
| Complete Dream Abyss Battle: Troublemaker |
|
| Complete all Dream Abyss investigation stage commissions |
|

Dream Abyss is part of the Dream Investigation story and battle mode within the When Dreams Remain Unfinished event.
During the event, Proxies must deploy Organic companions to battle against the enemies and complete the story commissions.
When Dreams Remain Unfinished Guide

When Dreams Remain Unfinished Event
| When Dreams Remain Unfinished Guides | |
|---|---|
Simulation Challenge |
Companion Database |
| Unlock | Day | Quest & Stage Guides |
|---|---|---|
| Oct. 17, 2025 | ![]() |
Light Nap Quest and Battle Guide |
| Oct. 19, 2025 | ![]() |
Deep Sleep Quest and Battle Guide |
| Oct. 21, 2025 | ![]() |
Dream Abyss Quest and Battle Guide |

Dream Abyss Quest and Battle Guide



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