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!

Deadly Assault Reset

Deadly Assault Reset Calendar

Deadly Assault Stages For This Phase

All Deadly Assault Stages
Sacrifice - Bringer	Autonomous Assault Unit - Typhon Destroyer	Dead End Butcher

These are all the current enemies in the January 10, 2024 update for Deadly Assault.

List of All Enemies

Deadly Assault Buffs For This Phase

Deadly Assault Buffs
Graceful Mastery	• Increases Agent Anomaly Buildup Rate by 25% and Anomaly Proficiency by 40. • When an enemy suffers an Attribute Anomaly, Agents recover 500 additional Decibels and ATK increases by 30% for 15s. The Decibel recovery effect can trigger once every 15s.
Swift Resolution	• Agent ATK increases by 20%, Decibel Generation Rate increases by 20%. Upon launching an Ultimate, Agent ATK increases by an additional 15% for 15s. Ultimate DMG increases by 40%, Daze dealt increases by 20%, and Anomaly Buildup increases by 20%.
Overthrow	• Increases Agent Daze by 25% and Chain Attack DMG by 80%. • When a Chain Attack is triggered, the Agent recovers 20 Energy, and DMG increases by 50% 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 net you large Performance Points, leading to an easier time getting 3-star ratings.

It can also help you understand the boss you're going to be up against better.

Deadly Assault Resets Every Other Friday

Deadly Assault Reset Date and Countdown
January 24, 2025

Deadly Assault will reset every other Friday. This resets all your progress so that you will be able to collect 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.

Shiyu Defense Guide and Reset

Sacrifice - Bringer Stage Guide

Sacrifice - Bringer Stage Details

Sacrifice - Bringer Information
Sacrifice - Bringer
Weaknesses	Resistances
Ice	Physical
Enemy Details
• When inflicting an Attribute Anomaly or Disorder on a boss enemy, all squad members gain 1 stack of Laser Focus, which stacks up to 6 times. Each stack of Laser Focus increases the Agent's CRIT Rate by 5%. When having at least 3 stacks of Laser Focus, inflicting an Attribute Anomaly will increase its duration by 5s. When Sacrifice - Bringer attacks with his Sacrificial Knife, all Squad members' Laser Focus will be reset. • Successfully interrupting a chant grants 2,000 Performance Points. A maximum of 5,000 points can be obtained.

Sacrifice - Bringer Best Teams and Buffs

Miyabi Disorder Team	Agents & Bangboo: Burnice Soukaku Miyabi Sharkboo Buff: Swift Resolution
Mono-Fire Team	Agents & Bangboo: Lighter Lucy Soldier 11 Rocketboo Buff: Swift Resolution

Characters selected in one stage cannot be used in other stages. Save characters for other stages and form your teams carefully.

Ice teams are recommended against the Sacrifice - Bringer boss. If you have both Ice teams mentioned above, prioritze the Miyabi team for this stage since Attribute Anomalies have an advantage here.

How to Beat Sacrifice - Bringer

Save Your Ultimates for the Giant Arm

During the fight, Sacrifice Bringer will disappear and a giant arm will appear to charge up and unleash Sacrificial Knife, which is a series of powerful attacks.

To prevent this from happening, save your Ultimates until the giant arm shows up to interrupt the Sacrificial Knife. This will also result in massive Performance Points.

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Autonomous Assault Unit - Typhon Destroyer Stage Guide

Autonomous Assault Unit - Typhon Destroyer Stage Details

Typhon Destroyer Information
Autonomous Assault Unit - Typhon Destroyer
Weaknesses	Resistances
Electric	Fire
Enemy Details
• Agents inflict Overwhelmed when landing a Defensive Assist hit against a Boss enemy, and 3 stacks of Overwhelmed when accumulating 3 Defensive Assist hits and triggering Impaired. Each stack of Overwhelmed increases Daze by 15%, and Chain Attack and Ultimate DMG taken while Stunned by 10%. The enemy will fix the impaired parts and reset the impairment level while charging, and will reset its Overwhelmed stacks after recovering from Stun. • Successfully impairing an enemy grants 600 Performance Points. A maximum of 5,000 Performance Points can be obtained.

Autonomous Assault Unit - Typhon Destroyer Best Teams and Buffs

Disorder Team	Agents & Bangboo: Yanagi Rina Harumasa Plugboo Buff: Graceful Mastery
Alternate Disorder Team	Agents & Bangboo: Jane Seth Yanagi Plugboo Buff: Graceful Mastery

Characters selected in one stage cannot be used in other stages. Save characters for other stages and form your teams carefully.

The recommended Attribute against the Typhon Destroyer is Electric. Avoid using Fire Agents as it is resistant to it. Furthermore, it would be wise to bring along characters that can initiate Defensive Assists.

How to Beat Autonomous Assault Unit - Typhon Destroyer

Use Defensive Assists as Much as Possible

Taking into account the stage's optimization on Defensive Assists, it would be wise to use it as much as possible to stack up on Performance Points and negate DMG at the same time.

However, do keep an eye on your Assist Points. Inflicting Disorder as much as possible will result in large amounts of Daze and stun the enemy, so use Chain Attacks to replenish your Assist Points!

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Dead End Butcher Stage Guide

Dead End Butcher Stage Details

Dead End Butcher Information
Dead End Butcher
Weaknesses	Resistances
Ether Ice	None
Enemy Details
• When not in a Stunned state, Boss enemies gain 1 stack of All or Nothing every 6s, stacking up to 3 stacks. Each stack of All or Nothing increases the damage dealt by the Boss enemy by 10%. When an Agent's attack hits an enemy, the Agent's CRIT DMG increases by 25% for each stack of All or Nothing the target has. All or Nothing stacks will be reset when the enemy recovers from being Stunned. • Successfully triggering Perfect Dodge grants 150 Performance Points. A maximum of 5,000 Performance Points can be obtained.

Dead End Butcher Best Teams and Buffs

Miyabi Team	Agents & Bangboo: Lighter Soukaku Miyabi Agent Gulliver Buff: Swift Resolution
Ellen Team	Agents & Bangboo: Ellen Lighter Soukaku Sharkboo Buff: Overthrow
Zhu Yuan Team	Agents & Bangboo: Zhu Yuan Qingyi Nicole Resonaboo Buff: Overthrow

Characters selected in one stage cannot be used in other stages. Save characters for other stages and form your teams carefully.

We recommend that you bring Ice and Ether agents against the Dead End Butcher. Characters who can easily dodge and have parries like Miyabi and Qingyi will be effective against their attacks.

We also recommend bringing along Stun Agents as you will need to rely on Chain Attacks for netting large amounts of Performance Points.

How to Beat Dead End Butcher

Dodge as Much as Possible

Keeping in mind the stage's optimization on Dodges and Dodge Counters, it would be wise to do so often and bring along characters that excel in it.

You will be fighting the Dead End Butcher in its second and final form, so its attacks will be much more aggressive and erratic. Always keep an eye out for golden attack cues, but be sure to keep a safe distance if push comes to shove.

Save Your Ultimates for When the Butcher Jumps Around

In the latter parts of the battle, the Butcher will jump all over the battlefield in great distances, evading attacks, dealing AoE DMG, and unneccesarily prolonging the battle.

Save your Ultimates for when this happens as Ultimates are almost guaranteed to interrupt an enemy's actions no matter how large they may be. Doing so will have the Butcher stay in place and rethink its strategy.

Jump Back to All Stage Guides

How to Play Deadly Assault

1. Use Appropriate Agents
2. Stage Effects and Buffs
3. Aim for a High Score
4. Reset Your Lineup if Necessary

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 ascertain each and every boss' weaknesses and resistances 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 chose 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

1.4 Release Date and Banners Guide

ZZZ Version 1.4 News
1.4 Release Date	1.4 Livestream
1.4 Livestream Codes	All Redeem Codes
Miyabi Banner	Harumasa Banner
W-Engine Banner	Bangboo Banner
ZZZ Version 1.4 Agents
Miyabi NEW	Harumasa NEW
ZZZ Version 1.4 W-Engine
Hailstorm Shrine	Zanshin Herb Case
ZZZ Version 1.4 Bangboo
Agent Gulliver	Brawlerboo
ZZZ Version 1.4 Quests
Chapter 5 - A Storm of Faling Stars	Harumasa Agent Story: A Name Written in Water
ZZZ Version 1.4 Drive Discs
Branch & Blade Song	Astral Voice
Version 1.4 Travel Areas
1.4 New Areas: Port Elpis and Reverb Arena
ZZZ Version 1.4 End Game
Hollow Zero: Shadows Lost	Deadly Assault
ZZZ Version 1.4 Events
Into that Pale Wasteland	Bangboo VS Ethereal
Where the Stars Shine Bright	Combat Footage Review
Collab Designer	Advanced Bounty: Routine Cleanup
Data Bounty: Combat Simulation	TV Schedule: Windchaser Harumasa
"En-Nah" Into Your Lap	All-New Program
A Storm of Falling Stars	Special Visitor
Assembly Commission: Return to Ridu