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Ozma Boss Fight Guide: How to Beat Ozma in The First Berserker: Khazan

A practical Ozma guide for Mission 16 in The First Berserker: Khazan, with documented phase 1 and 2 tactics and clear limits on phase 3 coverage.
WorldThe First Berserker: Khazan Length2 min Posted Quest giverVGSources Team
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Ozma is the final boss in Mission 16 of The First Berserker: Khazan. For the first two phases, focus on staying close, clearing Chaos Spears, and responding differently to chaos-infused and physical attacks. The available written guide does not provide a verified phase 3 walkthrough, so the tactics below cover only what its author describes.

How to beat Ozma in phase 1

Destructoid’s guide recommends fighting at close range: it says Ozma attacks more when you stay far away. Staying near the boss also gives you a clearer chance to react to the spear attacks the guide highlights.

Manage Chaos Spears

  • Parry or use Perfect Guard against incoming spears when you can time the response.
  • Destroy spears embedded in the ground before they accumulate. Destructoid warns that leaving them there can enable powerful attacks.

The same guide recommends carrying Chaos, Fire, and Water purification items for this phase. That is its item advice, not a verified requirement or a comparison showing those items are better than alternatives.

How to beat Ozma in phase 2

In phase 2, identify whether an attack is chaos-infused or a non-chaos physical attack before choosing your defense. Destructoid recommends dodging chaos-infused attacks to prevent chaos buildup, and Perfect Guarding non-chaos physical attacks.

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Use the winged eyes as a warning

When Ozma’s eight winged eyes open, the guide says a dangerous Chaos ability is coming. After the ability, the eyes temporarily close; use that brief opening to attack. Destructoid recommends Chaos purification items for this phase, but does not provide a full attack-string breakdown or precise timing chart.

What is known about phase 3?

Destructoid’s March 2025 guide says its author had not yet triggered phase 3 and would update that section later. It therefore does not establish phase 3 mechanics or provide a complete true-ending walkthrough. A search result elsewhere mentions three phases, but the consulted written material does not reliably explain how endings affect the encounter, so this guide does not infer those details.

Choose a build that suits your defense style

No particular weapon or skill is established as mandatory for Ozma. PowerPyx describes the game’s weapon styles in general terms; its Ozma entry is an embedded video without a text strategy, so it does not support a weapon ranking specifically for this fight.

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Weapon style General emphasis described by PowerPyx What that means for this guide
Dual Wield Damage and dodging A general fit for players who prefer evasion; not demonstrated as best against Ozma.
Greatsword Charged attacks and brink guarding A general fit for players comfortable with charged attacks and guarding; not demonstrated as best against Ozma.
Spear Stamina damage, guarding, and dodging PowerPyx favors Spear in its general build guide, but does not establish it as required or best for Ozma.

The official PlayStation game page describes skills that can be reset and respecced at any time, along with gear sets that provide attributes and skills. If your current setup is not working, adjusting skills or loadout is an option; the page does not prescribe an Ozma-specific build.

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Healing and recovery

PowerPyx describes Netherworld Energy as a regular healing resource that recharges at a Blade Nexus. Its guide also says Willpower Orbs consume Spirit, restore 50% health, and can be carried up to 20 at a time. Those figures are guide-reported item details, not an official item reference; check the item description in your game for the values that apply to your version.

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