Understand Akuoumaru
Useful when…
- Consider it for a claymore wielder whose damage relies on their Elemental Burst, especially in a party with high combined maximum Energy capacity.
- Compare its Burst-focused bonus with alternatives that provide broader ATK or damage bonuses when the wielder’s damage is spread across attack types.
How does the passive scale?
For each point of combined maximum Energy capacity across all party members, the wielder gains Burst DMG: 0.12% per point at refinement 1, rising to 0.24% at refinement 5. The bonus has a cap, from 40% at refinement 1 to 80% at refinement 5. In practical terms, the team’s combined Energy capacity determines how much of that cap the weapon can reach; the passive does not say that Energy Recharge itself increases the bonus.
When is it a useful damage option?
Its ATK secondary stat and Burst-only passive point toward a wielder who benefits from ATK and deals a significant portion of their damage with their Elemental Burst. The passive does not directly increase Normal, Charged, or Skill DMG, so its value depends on how the wielder’s damage is distributed. For a broader ATK-oriented alternative, Ultimate Overlord’s Mega Magic Sword has ATK as its secondary stat and a refinement-dependent ATK bonus; that does not make it a direct equivalent, since Akuoumaru’s scaling depends on party Energy capacity and specifically boosts Burst DMG.
What should be improved first?
Weapon ascension is the straightforward investment for improving the weapon’s level and base stats. Refinement improves the passive’s per-point rate and its cap, but each step consumes another Akuoumaru copy. Refinement is most relevant when you expect to keep using the weapon on a Burst-focused wielder and have copies available; the passive already has a defined benefit at refinement 1.
What can limit its value?
A party with lower combined maximum Energy capacity gets less Burst DMG from the passive, while a wielder whose damage is not Burst-centered makes less use of its specialized bonus. A Teaspoon of Transcendence and A Thousand Blazing Suns have different attack and reaction conditions in their listed passives; neither should be treated as a general replacement solely from its weapon category or rarity.
Limitations and tradeoffs
- The passive is limited to Elemental Burst DMG, so its benefit depends on the wielder’s damage pattern.
- The bonus scales with the whole party’s combined maximum Energy capacity, not with an individual character’s Energy Recharge.
- Refinement consumes additional copies, while its improvement increases both the scaling rate and the maximum bonus.
Common mistakes to avoid
- Do not count Energy Recharge as additional maximum Energy capacity; the listed passive uses the party’s combined maximum Energy capacity.
- Do not assume the passive boosts Skill, Normal, or Charged Attack DMG; it specifies Elemental Burst DMG.
- Do not refine it with a copy before deciding whether you want to keep that copy as another claymore option.