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Unknown Corruption Complex is a Notorious Hunt weekly boss that players can challenge inZenless Zone Zero. Players can claim rewards fromNotorious Hunt bossesup to three times each week, including Core Skill upgrade materials and Investigation Merits.
Players can unlock Unknown Corruption Complex by completing the quest[Investigation] Trace to the Sourceat the end of Chapter 2. Unknown Corruption Complex in Notorious Hunt is much more difficult than the one encountered during the story. However, with proper team compositions and an understanding of boss attack patterns, players can conquer Unknown Corruption Complex inZenless Zone Zeroeven with free A-Rank agents.

Boss Weaknesses, Team Compositions, & Resonium Choice
Unknown Corruption Complex is a corrupted construction machine that players first encounter together withBelobog Heavy Industriesat the end of Chapter 2. The boss has two main weaknesses that players can exploit:Electric and Ether.
Anby and Nicole are both great free options for players.As an Electric Agent, Anby’s Stun specialtyallows players to lock down the boss with Stun and Shock, increasing damage windows for the team.Nicole, an Ether support, also provides fantastic utility through her DEF reduction on enemies from her Core Skill. When it comes to premium choices, Grace and Anton are both excellent Electric damage-dealing options. Regardless of the chosen Agents, it is recommended to at least have a Stun specialty Agent on the team to increase the boss’s downtime.

Players can eatBone Broth Noodlesat the Noodle Shop for a 30% DMG buff against bosses.
Once players enter the encounter, they will be asked to choose a Resonium. While the best choice is dependent on the player’s team,[Assist] Ether Reaction Deviceis an excellent option for more frequent Anomaly applications on the boss.

After choosing a Resonium, players will first need to fight a special version of a Heavy Striker before facing the boss. Unlike a normal Heavy Striker, which is weak to Fire and Physical, the shield on this version can only be brokenby a Stun from Dazeor a Shock Anomaly. As with the normal version, it is recommended to stand behind the Striker to avoid its frontal fire, missiles, and charge attacks.
How to Beat Unknown Corruption Complex (Phase 1)
The Unknown Corruption Complex encounter heavily emphasizes dodging, as many of the boss’s abilities cannot be parried. The boss’s main hitboxes are its four legs, which can unexpectedly shift positions as the boss executes its attacks, causing players to miss abilities. While players can also attack its main body, it is not recommended to get that close due to the restrictive space, making it harder to dodge. The majority of the boss’s attack patterns can be found in Phase 1.
How to Beat Unknown Corruption Complex (Phase 2)
After depleting Unknown Corruption Complex’s HP bar, it will begin transitioning to Phase 2. Be careful during the transition, as the boss will swing its arms around him. Although attack patterns remain largely the same, the boss becomes faster and some attacks gain slight variations.
If players are not confident about dodging, they can bring Ben to Block and Counter with his Special Attack.

Unknown Corruption Complex can be quite a challenging encounter inZenless Zone Zerodue to its wide variety of unparryable attack patterns. However, with the right team composition, players can effectively lock down the boss through Stuns and Shocks, reducing the frequency of its attacks and making the fight more manageable.
