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Zenless Zone Zero (ZZZ)
Deadly Assault Guide and Reset
☆ New: Tier List Maker & Community Tier List Contest!
★ Upcoming: Version 2.5, Zhao, & Ye Shunguang!
☆ 2.4 Agents: Dialyn, & Banyue
★ 2.3 Phase 2: Yidhari Release & Ju Fufu Rerun
☆ 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 Reset
Deadly Assault Reset Calendar
Deadly Assault Stages For This Phase
| Deadly Assault Stages and Weakness | ||
|---|---|---|
 Notorious Marionette |
 Ye Shiyuan the Thrall |
 Miasmic Fiend |
 
|
|
|
Click on the boss icon to jump to a stage guide!
These are all the current enemies in the November 28, 2025 update for Deadly Assault.
All Current and Upcoming Bosses in 2.4
| Phase | Bosses | ||
|---|---|---|---|
| 1 | Notorious - Marionette |
Ye Shiyuan the Thrall |
Miasmic Fiend |
| 2 |  Wandering Hunter |
Ye Shiyuan the Thrall |
 Sacrifice - Bringer |
Deadly Assault Buffs For This Phase
| Buff | Deadly Assault Buff Effect |
|---|---|
 Meditation |
• Agent Max HP increases by 30%, Ultimate DMG increases by 40%. • After using an Ultimate, Energy and Adrenaline Generation Rate increases by 15%, Ether DMG and Ice DMG increases by 40% for 20s. |
 Sever Pulse |
• Agent Ultimate DMG increases by 30%, and when Agents Stun enemies, their Stun DMG Multiplier increases by 50%. • After Agents with the Stun specialty use EX Special Attack, when any squad member's attacks hit enemies, ignore 7% All-Attribute RES for 30s, stacking up to 3 times, and the duration of each stack is calculated separately. |
 Aberration |
• Increases the Agent's Anomaly Buildup Rate by 20%. • When inflicting Attribute Anomaly on enemies, all squad members gain 60 points of Anomaly Proficiency, and DMG caused by Disorder increases by 40% for 15 seconds. |
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 Resets Every Other Friday
| Deadly Assault Reset Date and Countdown |
|---|
| December 12, 2025 |
Deadly Assault will reset 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.
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.
Notorious Marionette Stage Guide
Notorious Marionette Stage Details
| Stage Boss Information | |
|---|---|
|
Notorious - Marionette
|
|
| Weaknesses | Resistances |
| None | |
| Enemy Details | |
|
• DMG dealt by Boss enemies increases by 25%. When a clone is destroyed or when the main body is stunned, 1/5 stacks of On Thin Ice is inflicted on Boss enemies respectively. Each stack of On Thin Ice decreases the DMG dealt by the Boss by 5% and increases the Ice DMG and Electric DMG dealt to the Boss by Agents by 10%. On Thin Ice, stacks will be reset when the enemy recovers from Stun.
• Successfully destroying a dance partner grants 200 Performance Points. A maximum of 5,000 Performance Points can be obtained. |
|
Notorious Marionette Best Teams and Buffs
| Best Teams & Bangboo | Buff |
|---|---|
|
Aberration |
|
Meditation |
|
Sever Pulse |
|
Meditation |
Characters selected in one stage cannot be used in other stages. Save characters for different stages and form your teams carefully.
How to Beat Notorious Marionette
Destroy the Dance Partner Often
The best way to defeat the Notorious Marionette is to keep destroying their partner as much as possible. You can gain about 5,000 Performance Points!
Avoid Spinning Twin Attacks
The Notorious Marionette separates and spins around, dealing a lot of DMG to your characters if they've been caught. Best switch to another character as you see their attack cues to counter them!
Ye Shiyuan the Thrall Stage Guide
Ye Shiyuan the Thrall Stage Details
| Stage Boss Information | |
|---|---|
|
Ye Shiyuan The Thrall
|
|
| Weaknesses | Resistances |
| Enemy Details | |
|
• Suitable for Agents with Stun specialty.
• When Sobek and The Thrall alternate turns, The Thrall gains 1 stack of Contract and Self-Sacrifice. Contract and Self Sacrifice can stack up to 3 times. Each stack of Contract increases All-Attribute Anomaly Buildup RES by 15%, each stack of Self-Sacrifice increases Stun DMG Multiplier by 10%. When The Thrall is Stunned, CRIT DMG taken increases by 50%. • When Agents inflict Weakened on Sobek and The Thrall, 1,500 Performance Points will be awarded. When an Agent eliminates Sobek, 2,000 Performance Points will be awarded. Up to a maximum of 5,000 Performance Points can be earned. |
|
Ye Shiyuan the Thrall Best Teams and Buffs
| Best Teams & Bangboo | Buff |
|---|---|
|
|
Meditation |
|
|
Sever Pulse |
|
Sever Pulse |
|
Sever Pulse |
Characters selected in one stage cannot be used in other stages. Save characters for different stages and form your teams carefully.
How to Beat Ye Shiyuan the Thrall
Parry Fusion Attacks
Ye Shiyuan the Thrall is accompanied by a large Ethereal called Sobek. When the duo charges at you with a Fusion Attack, use Defensive Assists to parry and put them in a weakened state.
Applying this weakened state allows you to focus purely on offense and rewards you with Performance Points.
Defeat Sobek
During certain times in the fight, The Thrall will leave the battlefield, and you will face Sobek on its own. Sobek is immune to Stun and Attribute Anomaly effects, so be sure to keep this in mind when building a team.
Defeating Sobek will also reward you with Performance Points, though The Thrall can call it back into battle afterwards.
Miasmic Fiend - Unfathomable Stage Guide
Miasmic Fiend Unfathomable Stage Details
| Stage Boss Information | |
|---|---|
|
Unfathomable
|
|
| Weaknesses | Resistance |
| Enemy Details | |
|
• When Miasmic Fiend is affected by Attribute Anomaly, it takes 8% bonus Anomaly DMG from Agents, stacking up to 6 times; activating Miasmic Shield clears all stacks, with each stack increasing the reduction efficiency of Miasmic Shield by 2.5%.
• When Agents bait Miasmic Fiend's ground attack into detonating at least 5 Miasma Pools at once and avoid being hit by the attack and pool explosions, they will earn 1,700 Performance Points, up to a maximum of 5,000. |
|
Miasmic Fiend - Unfathomable Best Teams and Buffs
| Best Teams & Bangboo | Buff |
|---|---|
|
Aberration |
|
Meditation |
|
Aberration |
|
Sever Pulse |
Characters selected in one stage cannot be used in other stages. Save characters for different stages and form your teams carefully.
How to Beat Miasmic Fiend - Unfathomable
Avoid Getting Hit by Miasma Pools
When the Miasmic Fiend - Unfathomable jumps and tries to hone Miasmic Pools on you, you must dodge it before it detonates and causes immense damage to your active character.
To do this, observe the red highlight on the floor, where there will be two circles: one for the entire circumference of the attack and the other to indicate when it will detonate.
When it's near the edge of the outer circle, dodge! Doing so five times will grant 1,700 Performance Points up to 5,000!
Keep an Eye on Continuous Attacks
Similar to the Miasma Priest, the Miasmic Fiend - Unfathomable is capable of successive attack cues that you must either use Perfect Assist or Dodge Counters. Otherwise, it will deal a significant amount of damage.
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
21 
Anonymous 6 days
Anonymous 6 daysAre these teams that can get 20,000 or teams that can barely clear it and you think look cool? I'm seriously wanting to know. There's no way Ellen and Lycaon can get S rank on The Thrall. These "guides" have become slop with just basic information slapped together lately.
Author
Deadly Assault Guide and Reset
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Thanks for the spoiler game8. Even the game blocks out the name of the new boss for now. Not everyone does the story immediately after it drops. FFS