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Zenless Zone Zero (ZZZ)
Deadly Assault Guide and Reset
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☆ New: Tier List Maker & Co-Op Board!
★ 2.6 Phase 1: Sunna & Yixuan
☆ 2.6 Phase 2: Aria & Yuzuha
★ Tier Lists: Agents | W-Engines | Bangboos | Teams
☆ Redeem Codes for free Polychromes!
Deadly Assault is an endgame battle mode in Zenless Zone Zero (ZZZ) where Proxies will face 3 bosses. Check out when Deadly Assault resets, how to beat each stage, and rewards here!
| Endgame Guides | |
|---|---|
 Shiyu Defense |
 Deadly Assault |
List of Contents
Deadly Assault Latest News
New Boss and Squad Building Guide
As of Version 2.5, the boss Primordial Nightmare has been added to the Deadly Assault lineup. Additionally, the new Squad Building Guide is now available for Proxies to use.
The Squad Building Guide gives Proxies a preview of the teams used by other players against a particular boss, which can be used as inspiration for their own team lineups!
Deadly Assault Reset
Deadly Assault Reset Calendar
Deadly Assault Stages For This Phase
| Deadly Assault Stages and Weakness | ||
|---|---|---|
 Primordial Nightmare |
 Unknown Corruption Complex |
 Wandering Hunter, |
|
 
|
 
|
Click on the boss icon to jump to a stage guide!
These are all the current enemies in the January 30, 2026 update for Deadly Assault.
All Bosses in 2.6
| Phase | Bosses | ||
|---|---|---|---|
| 1 | Primordial Nightmare |
 Miasma Priest |
 Notorious - Dead End Butcher |
| 2 | Discordant Solo - Vesper |  The Defiler |
Wandering Hunter |
| 3 |  Miasmic Fiend - Unfathomable |
 Miasma Ravager - Sobek |
Notorious - Pompey |
Deadly Assault Buffs For This Phase
| Buff | Deadly Assault Buff Effect |
|---|---|
 Adjudication |
• While in Ether Veil, Agent ATK increases by 20%, CRIT DMG increases by 20%. • Enemy Stun DMG Multiplier increases by 30%, and when Agent Basic Attacks and Ultimates hit enemies, they ignore 10% of Physical RES and 10% of DEF. |
 Frost Night |
• Agent Ice DMG and Physical DMG increase by 30%. • When inflicting Attribute Anomaly on enemies, the whole squad's ATK increases by 25%, and Decibel Generation Rate increases by 20% for 20s. Repeated triggers reset the duration. |
 Formation Breaker |
• After Stunning enemies, their Stun DMG Multiplier increases by 35%, and their Stun recovery speed decreases by 10%. • After an Agent uses an EX Special Attack, their CRIT DMG increases by 40% for 20s. |
These are the current buffs available for this season of Deadly Assault. It would be wise to familiarize yourself with them, as they can help you earn large Performance Points, making it easier to get 3-star ratings.
It can also help you better understand the boss you'll be up against.
Deadly Assault Reset
| Deadly Assault Reset Date and Countdown |
|---|
| February 13, 2026 |
Deadly Assault usually resets every other Friday. This resets all your progress, allowing you to collect the rewards again upon completion.
Season resets will also change the boss lineup and buffs available to you. For the current version, the next phase of Deadly Assault will reset on January 30, 2026.
How to Unlock Deadly Assault
Reach Inter-Knot Level 40 and Unlock Shiyu Defense
Deadly Assault can be unlocked after reaching Inter-Knot Level 40 and unlocking the Shiyu Defense game mode. Once done, clear the Deadly Situation commission to access the game mode.
Primordial Nightmare Stage Guide
Primordial Nightmare Stage Details
| Stage Boss Information | |
|---|---|
|
Primordial Nightmare - The Creator
|
|
| Weaknesses | Resistances |
| Enemy Details | |
|
• Suitable for Agents with Attack specialty.
• Boss Anomaly DMG taken is reduced by 30%. When switching from Miasmic Shield state to normal state, or from normal state to Miasmic Shield state, Agent CRIT DMG against them is increased by 20%. This effect can stack up to 3 times and resets when the boss recovers from Stun. • Triggering Miasmic Shield Purification grants 1,000 Performance Points. During the Control Skill, each successful counter against the Boss's attacks grants 500 Performance Points. Performing a Shutdown on the Boss's Control Skill grants 2,000 Performance Points. Maximum obtainable Performance Points: 5,000. | |
Primordial Nightmare Best Teams and Buffs
| Best Teams & Bangboo | Buff |
|---|---|
|
Adjudication |
|
Formation Breaker |
|
Formation Breaker |
|
Adjudication |
Characters selected in one stage cannot be used in other stages. Save characters for different stages and form your teams carefully.
How to Beat Primordial Nightmare
Avoid Control Skills
Avoiding these attacks will be a bit more challenging than usual since they will have no flash indicators when used. Also, keep in mind that players cannot trigger Ultimates.
Additionally, you can only switch Agents once during each attack, with each Agent being able to dodge once.
Force Boss Out of Miasmic Shield State
Primordial Nightmare becomes more aggressive when its Miasmic Shield is activated. You can force the boss out of this state by reducing its Miasmic Shield by a certain amount.
However, keep in mind that Primordial Nightmare can return to its Miasmic Shield state after accumulating a certain amount of Daze.
Unknown Corruption Complex Stage Guide
Unknown Corruption Complex Stage Details
| Stage Boss Information | |
|---|---|
|
Unknown Corruption Complex
|
|
| Weaknesses | Resistances |
| None | |
| Enemy Details | |
|
• When dealing sufficient DMG to the boss enemy's legs, Impaired will be triggered. Upon successfully breaking the boss enemy's legs, the Agent restores 1,000 Decibels, and the boss gains 1 stack of Disintegration for 20 seconds, up to a maximum of 4 stacks. When the Agent's attacks hit an enemy, for each stack of Disintegration the target has, CRIT DMG is increased by 25%.
• Successfully impairing an enemy grants 800 Performance Points. A maximum of 5,000 Performance Points can be obtained. |
|
Unknown Corruption Complex Best Teams and Buffs
| Best Teams & Bangboo | Buff |
|---|---|
|
|
Formation Breaker |
|
Adjudication |
|
Formation Breaker |
|
Frost Night |
Characters selected in one stage cannot be used in other stages. Save characters for different stages and form your teams carefully.
How to Beat Unknown Corruption Complex
Counter Attack Cues
To make it easier to handle the Unknown Corruption Complex, you must always hit the golden or red attack cues through Perfect Dodge or Perfect Assists to avoid DMG.
The Unknown Corruption Complex will also execute an attack where they will bring down their arm and use the wheels on it to grind your agents. Dodge away from that move to the back of the boss and attack there.
Line Up Your Ultimates
The best way to inflict as much damage as possible is to line up your character's ultimates and do them in succession.
Wandering Hunter Stage Guide
Wandering Hunter Stage Details
| Stage Boss Information | |
|---|---|
|
Wandering Hunter
|
|
| Weaknesses | Resistances |
| Enemy Details | |
|
• Suitable for Agents with Rupture Specialty.
• Wandering Hunter's Base DEF increases by 40% in Miasma Field; when an Agent hits Wandering Hunter with Assist Follow-Up or Dodge Counter, 1 stack of Wavering is applied. Wavering can stack up to 5 times and lasts 15 seconds. Repeated triggers reset the duration. • When an Agent's attacks hit Wandering Hunter, for each stack of Wavering, the Agent's Sheer DMG is increased by 7%. • During the hide-and-seek phase, using Perception Technique to break Drowned Ideal Lucia's true form will grant 3,000 Performance Points; after breaking the true form, successfully countering Wandering Hunter's ambush with Defensive Assist or Evasive Assist will grant 2000 Performance Points, up to a maximum of 5000 points. |
|
Wandering Hunter Best Teams and Buffs
| Best Teams & Bangboo | Buff |
|---|---|
|
Adjudication |
|
Adjudication |
|
Formation Breaker |
|
Frost Night |
Characters selected in one stage cannot be used in other stages. Save characters for different stages and form your teams carefully.
How to Beat Wandering Hunter
Avoid Miasmic Pools
Wandering Hunter can place several Miasmic Pools across the arena. Be sure to avoid these to prevent taking additional damage.
Use Perception Technique to Weaken Skills
When the Wandering Hunter activates its Miasmic Field, use Perception Technique on the Drowned Ideal Lucia emitting special energy. This will break the illusion and weaken the boss's incoming attack.
Purify Miasmic Barrier
The Wandering Hunter can also put up a Miasmic Barrier. Purify it by using Ultimates and Dodge Counters.
How to Play Deadly Assault
Deadly Assault Guide
Use Appropriate Agents for Each Battle
One thing to note when braving Deadly Assault is that previously used Agents and Bangboo cannot be used again in the next battle. Each and every battle will require unique teams.
In light of this, it would be wise to identify each boss's weaknesses and resistance before taking on the challenge. That way, you can formulate parties accordingly.
Take Advantage of Stage Effects and Buffs
Each stage in Deadly Assault will have stage effects that may make the battle a little more challenging than usual. Additionally, they will provide gameplay-based buffs, such as increasing the Anomaly Buildup Rate.
With this in mind, Proxies will be able to better formulate parties based on the buffs and effects each stage provides. Be sure to review the stage buffs and effects and strategize accordingly!
Aim for a High Score for Higher Ratings
In Deadly Assault, your performance rating will be based on how many objectives you can complete during battle. Completing an objective will increase your overall score.
Your scores will be determined by two things: Damage Score, which is determined by dealing a certain amount of DMG, and Mechanics Score, which is determined by performance such as using Perfect Assists and Chain Attacks.
Reset Your Lineup if Necessary
If you find that certain characters are necessary for other battles, you may reset your lineup to make them available for other stages even after using them in one. Keep in mind that this will reset your records.
However, this will not reset your progress. If you've already acquired three stars in one battle and you choose to reset your lineup, the rewards you can acquire for getting three stars will still be available to get!
Deadly Assault Rewards
Total Deadly Assault Rewards
| Total Deadly Assault Rewards |
|---|
 Polychrome
x300 Investigation Merits x720 Denny
x25,000 |
Proxies will only have to obtain 6 stars to get all the Polychromes for Deadly Assault. That means each stage will only require you to achieve 2 stars if you're having a difficult time getting a 3-star.
Deadly Assault Rewards Per Star
| Objective | Rewards |
|---|---|
| 1-Star | Polychrome
x50 Investigation Merits x80 Denny
x25,000 |
| 2-Star | Polychrome
x50 Investigation Merits x80 Denny
x25,000 |
| 3-Star | Polychrome
x50 Investigation Merits x80 Denny
x25,000 |
| 4-Star | Polychrome
x50 Investigation Merits x80 Denny
x25,000 |
| 5-Star | Polychrome
x50 Investigation Merits x80 Denny
x25,000 |
| 6-Star | Polychrome
x50 Investigation Merits x80 Denny
x25,000 |
| 7-Star | Investigation Merits x80 Denny
x25,000 |
| 8-Star | Investigation Merits x80 Denny
x25,000 |
| 9-Star | Investigation Merits x80 Denny
x25,000 |
Deadly Assault Achievements
| Title | How to Get and Rewards |
|---|---|
Raid Operation |
Obtain 3 stars in Deadly Assault Polychrome
x5 |
Blitz Breaker |
Obtain 7 stars in Deadly Assault Polychrome
x20 Blitz Operation Expert |
| Sweep the Battlefield |
Obtain 9 stars in Deadly Assault Polychrome
x20 Deadly Assault: Line Breaker |
Zenless Zone Zero Related Guides
Guides by Category
Zenless Zone Zero Tips and Tricks
Comment
23 
Anonymous 2 months
Anonymous 2 monthsAstra, Evelyn and Dialyn can clear without problem the new boss with 3* also Sanby, Orphie and Trigger can clear the Lucia boss too.
Author
Deadly Assault Guide and Reset
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