Zenless Zone Zero: S-Anby and S-Billy Deadly Assault Clear Guide

To secure a 9-star clear in Zenless Zone Zero's Deadly Assault, keep S-Anby on the field during neutral combat to build Daze and counter attacks, then swap to S-Billy strictly during Stun windows to unload burst damage. Beating the challenge timers across all three nodes requires minimizing off-target damage and saving high-cost skills for maximum Stun multipliers.

Agent Roles and Combat Responsibilities

Dividing duties between S-Anby and S-Billy protects your carry from neutral damage while ensuring boss Daze meters fill steadily.

S-Anby (Daze Driver): Stays on-field during neutral phases. Her basic attack strings and EX Special attacks parry boss sequences, absorb incoming aggression, and generate Decibels for team Ultimates without burning unnecessary energy.
S-Billy (Burst Carry): Remains off-field until the boss is stunned. Once a Stun triggers, S-Billy enters via Chain Attack to spend stored energy on crouch-fire attacks, enhanced EX Specials, and his Ultimate while enemy damage multipliers are peaked.

Pyrois Attack Patterns and Counters

The Pyrois encounter features wide fire sweeps and arena hazard zones. Countering these specific attack strings prevents burn damage and creates direct openings for S-Anby to accelerate Daze buildup.

Boss Attack	Enemy Action	Counter Tactic
Ignited Leap Slash	Jumps into the air and crashes down with an area-of-effect fire blast.	Dodge Counter diagonally forward and left to clear the blast radius and strike immediately.
Twin Blade Sweep	Executes a two-hit horizontal slash that leaves an ignited ground trail.	Use a Defensive Assist on the first hit, then swap to S-Anby to punish the attack recovery.
Overdrive Flare Charge	Channels fire energy before charging across the arena.	Chain parries or activate an EX Special with invulnerability frames to interrupt the charge buildup.

Stun and Burst Rotation Sequence

Never activate an Ultimate outside of a Stun window. Use this five-step loop to cycle between building Daze and executing damage bursts:

Initiate Neutral: Open combat with S-Anby, using a Dodge Counter or Defensive Assist against the enemy's first attack to begin Daze accumulation.
Push the Daze Gauge: Weave S-Anby's EX Special attacks between basic strings to push the enemy's Daze meter past 80% while keeping the boss staggered.
Trigger Chain Attacks: Break the Stun threshold with S-Anby's heavy finisher, pass through any support or buffer in your lineup, and select S-Billy for the final chain hit.
Unload Burst Damage: Activate S-Billy's stance buffs, then unleash his full EX Special combo and Ultimate before the Stun meter expires.
Reset to Neutral: As the boss stands up, immediately switch back to S-Anby to deflect counterattacks and begin gathering Decibels for the next cycle.

Multi-Target and Node Pacing Tactics

Meeting the stage timer on nodes with escort mobs requires collateral targeting rather than split focus.

Pierce Alignment: Line up the primary elite behind smaller escort enemies. S-Billy's ranged attacks pierce through front targets, clearing secondary mobs without diverting focus from the main threat.
Dual-Threat Grouping: When facing two elite enemies, dodge diagonally around the arena perimeter to pull them into the same attack lane before activating high-cost EX Specials.