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Sanguine Sweeper, also known as Black Wolf Romeul, is a Boss in Zenless Zone Zero (ZZZ). See how to beat Sanguine Sweeper, its weakness and resistance, and how to unlock it here!

Sanguine Sweeper's boss card is unlocked automatically in Notorious Hunt and but you also encounter them in the Season 2 Epilogue Part 1 Main Story Quest, New: Eridan Sunset (A).
New Eridan Sunset Part 1 Main Story Guide

When Romeul accumulates a certain amount of Daze or takes a certain amount of DMG, he will put up a Corruptive Barrier, denoted by the purple bar replacing his HP gauge.
While this barrier is up, Agents will continuously lose HP, and DMG and Daze against Romeul will be reduced. He will then follow up with three lunging attacks, all of which are perfectly parryable.
Parry these strikes to quickly shred the Corruptive Barrier. Additionally, any attack countered by a Defensive Assist will also help bring down the barrier quickly!

Much like a lot of bosses starting from Version 2.5, the Sanguine Sweeper has a Control Skill that you need to watch out for.
Pay close attention to when he raises his sword and use Defensive Assists to negate any incoming DMG.
Successfully parrying all the Control Skill's hits will inflict Shutdown on Romeul and render him vulnerable for a short duration.

Sanguine Sweeper is a Notorious Hunt Boss released in version 2.7. Defeating it drops the Marrow-Draining Thorn Material used to upgrade an agent's advanced core skills.
| Sanguine Sweeper Overview | |
|---|---|
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| Type | Faction |
| Elite | Thugs |
| Weaknesses | Resistances |
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Here is the overview of Sanguine Sweeper and its Attribute affinities. Formulate your parties in accordance with its weaknesses and resistances to defeat it more effectively.

Sanguine Sweeper Boss Guide

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